胡斌 / srs

转到一个项目
Toggle navigation Toggle navigation pinning
winlin
2a9bec3d 1 parent aa69f619

adjust the api, move audio and h264 after rtmp

内嵌 并排对比
正在显示 2 个修改的文件 包含 693 行增加 和 693 行删除
... ... @@ -858,231 +858,622 @@ int srs_rtmp_write_packet(srs_rtmp_t rtmp, char type, u_int32_t timestamp, char*
return ret;
}
struct FlvContext
{
SrsFileReader reader;
SrsFileWriter writer;
SrsFlvEncoder enc;
SrsFlvDecoder dec;
};
/**
* write audio raw frame to SRS.
*/
int srs_audio_write_raw_frame(srs_rtmp_t rtmp,
char sound_format, char sound_rate, char sound_size, char sound_type,
char aac_packet_type, char* frame, int frame_size, u_int32_t timestamp
) {
Context* context = (Context*)rtmp;
srs_assert(context);
srs_flv_t srs_flv_open_read(const char* file)
{
int ret = ERROR_SUCCESS;
FlvContext* flv = new FlvContext();
if ((ret = flv->reader.open(file)) != ERROR_SUCCESS) {
srs_freep(flv);
return NULL;
}
// TODO: FIXME: for aac, must send the sequence header first.
if ((ret = flv->dec.initialize(&flv->reader)) != ERROR_SUCCESS) {
srs_freep(flv);
return NULL;
// for audio frame, there is 1 or 2 bytes header:
// 1bytes, SoundFormat|SoundRate|SoundSize|SoundType
// 1bytes, AACPacketType for SoundFormat == 10
int size = frame_size + 1;
if (aac_packet_type == SrsCodecAudioAAC) {
size += 1;
}
char* data = new char[size];
char* p = data;
return flv;
}
srs_flv_t srs_flv_open_write(const char* file)
{
int ret = ERROR_SUCCESS;
u_int8_t audio_header = sound_type & 0x01;
audio_header |= (sound_size << 1) & 0x02;
audio_header |= (sound_rate << 2) & 0x0c;
audio_header |= (sound_format << 4) & 0xf0;
FlvContext* flv = new FlvContext();
*p++ = audio_header;
if ((ret = flv->writer.open(file)) != ERROR_SUCCESS) {
srs_freep(flv);
return NULL;
if (aac_packet_type == SrsCodecAudioAAC) {
*p++ = aac_packet_type;
}
if ((ret = flv->enc.initialize(&flv->writer)) != ERROR_SUCCESS) {
srs_freep(flv);
return NULL;
}
memcpy(p, frame, frame_size);
return flv;
}
void srs_flv_close(srs_flv_t flv)
{
FlvContext* context = (FlvContext*)flv;
srs_freep(context);
return srs_rtmp_write_packet(context, SRS_RTMP_TYPE_AUDIO, timestamp, data, size);
}
int srs_flv_read_header(srs_flv_t flv, char header[9])
{
int ret = ERROR_SUCCESS;
/**
* write h264 packet, with rtmp header.
* @param frame_type, SrsCodecVideoAVCFrameKeyFrame or SrsCodecVideoAVCFrameInterFrame.
* @param avc_packet_type, SrsCodecVideoAVCTypeSequenceHeader or SrsCodecVideoAVCTypeNALU.
* @param h264_raw_data the h.264 raw data, user must free it.
*/
int __srs_write_h264_packet(Context* context,
int8_t frame_type, int8_t avc_packet_type,
char* h264_raw_data, int h264_raw_size, u_int32_t dts, u_int32_t pts
) {
// the timestamp in rtmp message header is dts.
u_int32_t timestamp = dts;
FlvContext* context = (FlvContext*)flv;
if (!context->reader.is_open()) {
return ERROR_SYSTEM_IO_INVALID;
}
// for h264 in RTMP video payload, there is 5bytes header:
// 1bytes, FrameType | CodecID
// 1bytes, AVCPacketType
// 3bytes, CompositionTime, the cts.
// @see: E.4.3 Video Tags, video_file_format_spec_v10_1.pdf, page 78
int size = h264_raw_size + 5;
char* data = new char[size];
char* p = data;
if ((ret = context->dec.read_header(header)) != ERROR_SUCCESS) {
return ret;
}
// @see: E.4.3 Video Tags, video_file_format_spec_v10_1.pdf, page 78
// Frame Type, Type of video frame.
// CodecID, Codec Identifier.
// set the rtmp header
*p++ = (frame_type << 4) | SrsCodecVideoAVC;
char ts[4]; // tag size
if ((ret = context->dec.read_previous_tag_size(ts)) != ERROR_SUCCESS) {
return ret;
}
// AVCPacketType
*p++ = avc_packet_type;
// CompositionTime
// pts = dts + cts, or
// cts = pts - dts.
// where cts is the header in rtmp video packet payload header.
u_int32_t cts = pts - dts;
char* pp = (char*)&cts;
*p++ = pp[2];
*p++ = pp[1];
*p++ = pp[0];
return ret;
// h.264 raw data.
memcpy(p, h264_raw_data, h264_raw_size);
return srs_rtmp_write_packet(context, SRS_RTMP_TYPE_VIDEO, timestamp, data, size);
}
int srs_flv_read_tag_header(srs_flv_t flv, char* ptype, int32_t* pdata_size, u_int32_t* ptime)
/**
* write the h264 sps/pps in context over RTMP.
*/
int __srs_write_h264_sps_pps(Context* context, u_int32_t dts, u_int32_t pts)
{
int ret = ERROR_SUCCESS;
FlvContext* context = (FlvContext*)flv;
if (!context->reader.is_open()) {
return ERROR_SYSTEM_IO_INVALID;
// only send when both sps and pps changed.
if (!context->h264_sps_changed || !context->h264_pps_changed) {
return ret;
}
if ((ret = context->dec.read_tag_header(ptype, pdata_size, ptime)) != ERROR_SUCCESS) {
// 5bytes sps/pps header:
// configurationVersion, AVCProfileIndication, profile_compatibility,
// AVCLevelIndication, lengthSizeMinusOne
// 3bytes size of sps:
// numOfSequenceParameterSets, sequenceParameterSetLength(2B)
// Nbytes of sps.
// sequenceParameterSetNALUnit
// 3bytes size of pps:
// numOfPictureParameterSets, pictureParameterSetLength
// Nbytes of pps:
// pictureParameterSetNALUnit
int nb_packet = 5
+ 3 + (int)context->h264_sps.length()
+ 3 + (int)context->h264_pps.length();
char* packet = new char[nb_packet];
SrsAutoFree(char, packet);
// use stream to generate the h264 packet.
SrsStream stream;
if ((ret = stream.initialize(packet, nb_packet)) != ERROR_SUCCESS) {
return ret;
}
return ret;
}
int srs_flv_read_tag_data(srs_flv_t flv, char* data, int32_t size)
{
int ret = ERROR_SUCCESS;
// decode the SPS:
// @see: 7.3.2.1.1, H.264-AVC-ISO_IEC_14496-10-2012.pdf, page 62
if (true) {
srs_assert((int)context->h264_sps.length() >= 4);
char* frame = (char*)context->h264_sps.data();
FlvContext* context = (FlvContext*)flv;
if (!context->reader.is_open()) {
return ERROR_SYSTEM_IO_INVALID;
// @see: Annex A Profiles and levels, H.264-AVC-ISO_IEC_14496-10.pdf, page 205
// Baseline profile profile_idc is 66(0x42).
// Main profile profile_idc is 77(0x4d).
// Extended profile profile_idc is 88(0x58).
u_int8_t profile_idc = frame[1];
//u_int8_t constraint_set = frame[2];
u_int8_t level_idc = frame[3];
// generate the sps/pps header
// 5.3.4.2.1 Syntax, H.264-AVC-ISO_IEC_14496-15.pdf, page 16
// configurationVersion
stream.write_1bytes(0x01);
// AVCProfileIndication
stream.write_1bytes(profile_idc);
// profile_compatibility
stream.write_1bytes(0x00);
// AVCLevelIndication
stream.write_1bytes(level_idc);
// lengthSizeMinusOne, or NAL_unit_length, always use 4bytes size,
// so we always set it to 0x03.
stream.write_1bytes(0x03);
}
if ((ret = context->dec.read_tag_data(data, size)) != ERROR_SUCCESS) {
return ret;
// sps
if (true) {
// 5.3.4.2.1 Syntax, H.264-AVC-ISO_IEC_14496-15.pdf, page 16
// numOfSequenceParameterSets, always 1
stream.write_1bytes(0x01);
// sequenceParameterSetLength
stream.write_2bytes(context->h264_sps.length());
// sequenceParameterSetNALUnit
stream.write_string(context->h264_sps);
}
char ts[4]; // tag size
if ((ret = context->dec.read_previous_tag_size(ts)) != ERROR_SUCCESS) {
return ret;
// pps
if (true) {
// 5.3.4.2.1 Syntax, H.264-AVC-ISO_IEC_14496-15.pdf, page 16
// numOfPictureParameterSets, always 1
stream.write_1bytes(0x01);
// pictureParameterSetLength
stream.write_2bytes(context->h264_pps.length());
// pictureParameterSetNALUnit
stream.write_string(context->h264_pps);
}
return ret;
}
int srs_flv_write_header(srs_flv_t flv, char header[9])
{
int ret = ERROR_SUCCESS;
FlvContext* context = (FlvContext*)flv;
if (!context->writer.is_open()) {
return ERROR_SYSTEM_IO_INVALID;
}
// reset sps and pps.
context->h264_sps_changed = false;
context->h264_pps_changed = false;
context->h264_sps_pps_sent = true;
if ((ret = context->enc.write_header(header)) != ERROR_SUCCESS) {
return ret;
}
// TODO: FIXME: for more profile.
// 5.3.4.2.1 Syntax, H.264-AVC-ISO_IEC_14496-15.pdf, page 16
// profile_idc == 100 || profile_idc == 110 || profile_idc == 122 || profile_idc == 144
return ret;
// send out h264 packet.
int8_t frame_type = SrsCodecVideoAVCFrameKeyFrame;
int8_t avc_packet_type = SrsCodecVideoAVCTypeSequenceHeader;
return __srs_write_h264_packet(
context, frame_type, avc_packet_type,
packet, nb_packet, dts, pts
);
}
int srs_flv_write_tag(srs_flv_t flv, char type, int32_t time, char* data, int size)
{
/**
* write h264 IPB-frame.
*/
int __srs_write_h264_ipb_frame(Context* context,
char* data, int size, u_int32_t dts, u_int32_t pts
) {
int ret = ERROR_SUCCESS;
FlvContext* context = (FlvContext*)flv;
// when sps or pps not sent, ignore the packet.
// @see https://github.com/winlinvip/simple-rtmp-server/issues/203
if (!context->h264_sps_pps_sent) {
return ERROR_H264_DROP_BEFORE_SPS_PPS;
}
// 5bits, 7.3.1 NAL unit syntax,
// H.264-AVC-ISO_IEC_14496-10.pdf, page 44.
// 7: SPS, 8: PPS, 5: I Frame, 1: P Frame
u_int8_t nal_unit_type = (char)data[0] & 0x1f;
// 4bytes size of nalu:
// NALUnitLength
// Nbytes of nalu.
// NALUnit
int nb_packet = 4 + size;
char* packet = new char[nb_packet];
SrsAutoFree(char, packet);
// use stream to generate the h264 packet.
SrsStream stream;
if ((ret = stream.initialize(packet, nb_packet)) != ERROR_SUCCESS) {
return ret;
}
if (!context->writer.is_open()) {
return ERROR_SYSTEM_IO_INVALID;
// 5.3.4.2.1 Syntax, H.264-AVC-ISO_IEC_14496-15.pdf, page 16
// lengthSizeMinusOne, or NAL_unit_length, always use 4bytes size
u_int32_t NAL_unit_length = size;
// mux the avc NALU in "ISO Base Media File Format"
// from H.264-AVC-ISO_IEC_14496-15.pdf, page 20
// NALUnitLength
stream.write_4bytes(NAL_unit_length);
// NALUnit
stream.write_bytes(data, size);
// send out h264 packet.
int8_t frame_type = SrsCodecVideoAVCFrameInterFrame;
if (nal_unit_type != 1) {
frame_type = SrsCodecVideoAVCFrameKeyFrame;
}
int8_t avc_packet_type = SrsCodecVideoAVCTypeNALU;
return __srs_write_h264_packet(
context, frame_type, avc_packet_type,
packet, nb_packet, dts, pts
);
if (type == SRS_RTMP_TYPE_AUDIO) {
return context->enc.write_audio(time, data, size);
} else if (type == SRS_RTMP_TYPE_VIDEO) {
return context->enc.write_video(time, data, size);
return ret;
}
/**
* write h264 raw frame, maybe sps/pps/IPB-frame.
*/
int __srs_write_h264_raw_frame(Context* context,
char* frame, int frame_size, u_int32_t dts, u_int32_t pts
) {
int ret = ERROR_SUCCESS;
// ignore invalid frame,
// atleast 1bytes for SPS to decode the type
if (frame_size < 1) {
return ret;
}
// 5bits, 7.3.1 NAL unit syntax,
// H.264-AVC-ISO_IEC_14496-10.pdf, page 44.
// 7: SPS, 8: PPS, 5: I Frame, 1: P Frame
u_int8_t nal_unit_type = (char)frame[0] & 0x1f;
if (nal_unit_type == 7) {
// atleast 1bytes for SPS to decode the type, profile, constrain and level.
if (frame_size < 4) {
return ret;
}
std::string sps;
sps.append(frame, frame_size);
if (context->h264_sps == sps) {
return ERROR_H264_DUPLICATED_SPS;
}
context->h264_sps_changed = true;
context->h264_sps = sps;
return __srs_write_h264_sps_pps(context, dts, pts);
} else if (nal_unit_type == 8) {
std::string pps;
pps.append(frame, frame_size);
if (context->h264_pps == pps) {
return ERROR_H264_DUPLICATED_PPS;
}
context->h264_pps_changed = true;
context->h264_pps = pps;
return __srs_write_h264_sps_pps(context, dts, pts);
} else {
return context->enc.write_metadata(data, size);
return __srs_write_h264_ipb_frame(context, frame, frame_size, dts, pts);
}
return ret;
}
int srs_flv_size_tag(int data_size)
{
return SrsFlvEncoder::size_tag(data_size);
/**
* write h264 multiple frames, in annexb format.
*/
int srs_h264_write_raw_frames(srs_rtmp_t rtmp,
char* frames, int frames_size, u_int32_t dts, u_int32_t pts
) {
int ret = ERROR_SUCCESS;
srs_assert(frames != NULL);
srs_assert(frames_size > 0);
srs_assert(rtmp != NULL);
Context* context = (Context*)rtmp;
if ((ret = context->h264_raw_stream.initialize(frames, frames_size)) != ERROR_SUCCESS) {
return ret;
}
// use the last error
// @see https://github.com/winlinvip/simple-rtmp-server/issues/203
// @see https://github.com/winlinvip/simple-rtmp-server/issues/204
int error_code_return = ret;
// send each frame.
while (!context->h264_raw_stream.empty()) {
// each frame must prefixed by annexb format.
// about annexb, @see H.264-AVC-ISO_IEC_14496-10.pdf, page 211.
int pnb_start_code = 0;
if (!srs_avc_startswith_annexb(&context->h264_raw_stream, &pnb_start_code)) {
return ERROR_H264_API_NO_PREFIXED;
}
int start = context->h264_raw_stream.pos() + pnb_start_code;
// find the last frame prefixed by annexb format.
context->h264_raw_stream.skip(pnb_start_code);
while (!context->h264_raw_stream.empty()) {
if (srs_avc_startswith_annexb(&context->h264_raw_stream, NULL)) {
break;
}
context->h264_raw_stream.skip(1);
}
int size = context->h264_raw_stream.pos() - start;
// send out the frame.
char* frame = context->h264_raw_stream.data() + start;
// it may be return error, but we must process all packets.
if ((ret = __srs_write_h264_raw_frame(context, frame, size, dts, pts)) != ERROR_SUCCESS) {
error_code_return = ret;
// ignore known error, process all packets.
if (srs_h264_is_dvbsp_error(ret)
|| srs_h264_is_duplicated_sps_error(ret)
|| srs_h264_is_duplicated_pps_error(ret)
) {
continue;
}
return ret;
}
}
return error_code_return;
}
int64_t srs_flv_tellg(srs_flv_t flv)
srs_h264_bool srs_h264_is_dvbsp_error(int error_code)
{
FlvContext* context = (FlvContext*)flv;
return context->reader.tellg();
return error_code == ERROR_H264_DROP_BEFORE_SPS_PPS;
}
void srs_flv_lseek(srs_flv_t flv, int64_t offset)
srs_h264_bool srs_h264_is_duplicated_sps_error(int error_code)
{
FlvContext* context = (FlvContext*)flv;
context->reader.lseek(offset);
return error_code == ERROR_H264_DUPLICATED_SPS;
}
srs_flv_bool srs_flv_is_eof(int error_code)
srs_h264_bool srs_h264_is_duplicated_pps_error(int error_code)
{
return error_code == ERROR_SYSTEM_FILE_EOF;
return error_code == ERROR_H264_DUPLICATED_PPS;
}
srs_flv_bool srs_flv_is_sequence_header(char* data, int32_t size)
int srs_h264_startswith_annexb(char* h264_raw_data, int h264_raw_size, int* pnb_start_code)
{
return SrsFlvCodec::video_is_sequence_header(data, (int)size);
SrsStream stream;
if (stream.initialize(h264_raw_data, h264_raw_size) != ERROR_SUCCESS) {
return false;
}
return srs_avc_startswith_annexb(&stream, pnb_start_code);
}
srs_flv_bool srs_flv_is_keyframe(char* data, int32_t size)
struct FlvContext
{
return SrsFlvCodec::video_is_keyframe(data, (int)size);
}
SrsFileReader reader;
SrsFileWriter writer;
SrsFlvEncoder enc;
SrsFlvDecoder dec;
};
srs_amf0_t srs_amf0_parse(char* data, int size, int* nparsed)
srs_flv_t srs_flv_open_read(const char* file)
{
int ret = ERROR_SUCCESS;
srs_amf0_t amf0 = NULL;
FlvContext* flv = new FlvContext();
SrsStream stream;
if ((ret = stream.initialize(data, size)) != ERROR_SUCCESS) {
return amf0;
if ((ret = flv->reader.open(file)) != ERROR_SUCCESS) {
srs_freep(flv);
return NULL;
}
SrsAmf0Any* any = NULL;
if ((ret = SrsAmf0Any::discovery(&stream, &any)) != ERROR_SUCCESS) {
return amf0;
if ((ret = flv->dec.initialize(&flv->reader)) != ERROR_SUCCESS) {
srs_freep(flv);
return NULL;
}
stream.skip(-1 * stream.pos());
if ((ret = any->read(&stream)) != ERROR_SUCCESS) {
srs_freep(any);
return amf0;
return flv;
}
srs_flv_t srs_flv_open_write(const char* file)
{
int ret = ERROR_SUCCESS;
FlvContext* flv = new FlvContext();
if ((ret = flv->writer.open(file)) != ERROR_SUCCESS) {
srs_freep(flv);
return NULL;
}
if (nparsed) {
*nparsed = stream.pos();
if ((ret = flv->enc.initialize(&flv->writer)) != ERROR_SUCCESS) {
srs_freep(flv);
return NULL;
}
amf0 = (srs_amf0_t)any;
return amf0;
return flv;
}
srs_amf0_t srs_amf0_create_number(srs_amf0_number value)
void srs_flv_close(srs_flv_t flv)
{
return SrsAmf0Any::number(value);
FlvContext* context = (FlvContext*)flv;
srs_freep(context);
}
srs_amf0_t srs_amf0_create_ecma_array()
int srs_flv_read_header(srs_flv_t flv, char header[9])
{
return SrsAmf0Any::ecma_array();
}
int ret = ERROR_SUCCESS;
FlvContext* context = (FlvContext*)flv;
srs_amf0_t srs_amf0_create_strict_array()
{
if (!context->reader.is_open()) {
return ERROR_SYSTEM_IO_INVALID;
}
if ((ret = context->dec.read_header(header)) != ERROR_SUCCESS) {
return ret;
}
char ts[4]; // tag size
if ((ret = context->dec.read_previous_tag_size(ts)) != ERROR_SUCCESS) {
return ret;
}
return ret;
}
int srs_flv_read_tag_header(srs_flv_t flv, char* ptype, int32_t* pdata_size, u_int32_t* ptime)
{
int ret = ERROR_SUCCESS;
FlvContext* context = (FlvContext*)flv;
if (!context->reader.is_open()) {
return ERROR_SYSTEM_IO_INVALID;
}
if ((ret = context->dec.read_tag_header(ptype, pdata_size, ptime)) != ERROR_SUCCESS) {
return ret;
}
return ret;
}
int srs_flv_read_tag_data(srs_flv_t flv, char* data, int32_t size)
{
int ret = ERROR_SUCCESS;
FlvContext* context = (FlvContext*)flv;
if (!context->reader.is_open()) {
return ERROR_SYSTEM_IO_INVALID;
}
if ((ret = context->dec.read_tag_data(data, size)) != ERROR_SUCCESS) {
return ret;
}
char ts[4]; // tag size
if ((ret = context->dec.read_previous_tag_size(ts)) != ERROR_SUCCESS) {
return ret;
}
return ret;
}
int srs_flv_write_header(srs_flv_t flv, char header[9])
{
int ret = ERROR_SUCCESS;
FlvContext* context = (FlvContext*)flv;
if (!context->writer.is_open()) {
return ERROR_SYSTEM_IO_INVALID;
}
if ((ret = context->enc.write_header(header)) != ERROR_SUCCESS) {
return ret;
}
return ret;
}
int srs_flv_write_tag(srs_flv_t flv, char type, int32_t time, char* data, int size)
{
int ret = ERROR_SUCCESS;
FlvContext* context = (FlvContext*)flv;
if (!context->writer.is_open()) {
return ERROR_SYSTEM_IO_INVALID;
}
if (type == SRS_RTMP_TYPE_AUDIO) {
return context->enc.write_audio(time, data, size);
} else if (type == SRS_RTMP_TYPE_VIDEO) {
return context->enc.write_video(time, data, size);
} else {
return context->enc.write_metadata(data, size);
}
return ret;
}
int srs_flv_size_tag(int data_size)
{
return SrsFlvEncoder::size_tag(data_size);
}
int64_t srs_flv_tellg(srs_flv_t flv)
{
FlvContext* context = (FlvContext*)flv;
return context->reader.tellg();
}
void srs_flv_lseek(srs_flv_t flv, int64_t offset)
{
FlvContext* context = (FlvContext*)flv;
context->reader.lseek(offset);
}
srs_flv_bool srs_flv_is_eof(int error_code)
{
return error_code == ERROR_SYSTEM_FILE_EOF;
}
srs_flv_bool srs_flv_is_sequence_header(char* data, int32_t size)
{
return SrsFlvCodec::video_is_sequence_header(data, (int)size);
}
srs_flv_bool srs_flv_is_keyframe(char* data, int32_t size)
{
return SrsFlvCodec::video_is_keyframe(data, (int)size);
}
srs_amf0_t srs_amf0_parse(char* data, int size, int* nparsed)
{
int ret = ERROR_SUCCESS;
srs_amf0_t amf0 = NULL;
SrsStream stream;
if ((ret = stream.initialize(data, size)) != ERROR_SUCCESS) {
return amf0;
}
SrsAmf0Any* any = NULL;
if ((ret = SrsAmf0Any::discovery(&stream, &any)) != ERROR_SUCCESS) {
return amf0;
}
stream.skip(-1 * stream.pos());
if ((ret = any->read(&stream)) != ERROR_SUCCESS) {
srs_freep(any);
return amf0;
}
if (nparsed) {
*nparsed = stream.pos();
}
amf0 = (srs_amf0_t)any;
return amf0;
}
srs_amf0_t srs_amf0_create_number(srs_amf0_number value)
{
return SrsAmf0Any::number(value);
}
srs_amf0_t srs_amf0_create_ecma_array()
{
return SrsAmf0Any::ecma_array();
}
srs_amf0_t srs_amf0_create_strict_array()
{
return SrsAmf0Any::strict_array();
}
... ... @@ -1321,397 +1712,6 @@ void srs_amf0_strict_array_append(srs_amf0_t amf0, srs_amf0_t value)
obj->append(any);
}
/**
* write audio raw frame to SRS.
*/
int srs_audio_write_raw_frame(srs_rtmp_t rtmp,
char sound_format, char sound_rate, char sound_size, char sound_type,
char aac_packet_type, char* frame, int frame_size, u_int32_t timestamp
) {
Context* context = (Context*)rtmp;
srs_assert(context);
// TODO: FIXME: for aac, must send the sequence header first.
// for audio frame, there is 1 or 2 bytes header:
// 1bytes, SoundFormat|SoundRate|SoundSize|SoundType
// 1bytes, AACPacketType for SoundFormat == 10
int size = frame_size + 1;
if (aac_packet_type == SrsCodecAudioAAC) {
size += 1;
}
char* data = new char[size];
char* p = data;
u_int8_t audio_header = sound_type & 0x01;
audio_header |= (sound_size << 1) & 0x02;
audio_header |= (sound_rate << 2) & 0x0c;
audio_header |= (sound_format << 4) & 0xf0;
*p++ = audio_header;
if (aac_packet_type == SrsCodecAudioAAC) {
*p++ = aac_packet_type;
}
memcpy(p, frame, frame_size);
return srs_rtmp_write_packet(context, SRS_RTMP_TYPE_AUDIO, timestamp, data, size);
}
/**
* write h264 packet, with rtmp header.
* @param frame_type, SrsCodecVideoAVCFrameKeyFrame or SrsCodecVideoAVCFrameInterFrame.
* @param avc_packet_type, SrsCodecVideoAVCTypeSequenceHeader or SrsCodecVideoAVCTypeNALU.
* @param h264_raw_data the h.264 raw data, user must free it.
*/
int __srs_write_h264_packet(Context* context,
int8_t frame_type, int8_t avc_packet_type,
char* h264_raw_data, int h264_raw_size, u_int32_t dts, u_int32_t pts
) {
// the timestamp in rtmp message header is dts.
u_int32_t timestamp = dts;
// for h264 in RTMP video payload, there is 5bytes header:
// 1bytes, FrameType | CodecID
// 1bytes, AVCPacketType
// 3bytes, CompositionTime, the cts.
// @see: E.4.3 Video Tags, video_file_format_spec_v10_1.pdf, page 78
int size = h264_raw_size + 5;
char* data = new char[size];
char* p = data;
// @see: E.4.3 Video Tags, video_file_format_spec_v10_1.pdf, page 78
// Frame Type, Type of video frame.
// CodecID, Codec Identifier.
// set the rtmp header
*p++ = (frame_type << 4) | SrsCodecVideoAVC;
// AVCPacketType
*p++ = avc_packet_type;
// CompositionTime
// pts = dts + cts, or
// cts = pts - dts.
// where cts is the header in rtmp video packet payload header.
u_int32_t cts = pts - dts;
char* pp = (char*)&cts;
*p++ = pp[2];
*p++ = pp[1];
*p++ = pp[0];
// h.264 raw data.
memcpy(p, h264_raw_data, h264_raw_size);
return srs_rtmp_write_packet(context, SRS_RTMP_TYPE_VIDEO, timestamp, data, size);
}
/**
* write the h264 sps/pps in context over RTMP.
*/
int __srs_write_h264_sps_pps(Context* context, u_int32_t dts, u_int32_t pts)
{
int ret = ERROR_SUCCESS;
// only send when both sps and pps changed.
if (!context->h264_sps_changed || !context->h264_pps_changed) {
return ret;
}
// 5bytes sps/pps header:
// configurationVersion, AVCProfileIndication, profile_compatibility,
// AVCLevelIndication, lengthSizeMinusOne
// 3bytes size of sps:
// numOfSequenceParameterSets, sequenceParameterSetLength(2B)
// Nbytes of sps.
// sequenceParameterSetNALUnit
// 3bytes size of pps:
// numOfPictureParameterSets, pictureParameterSetLength
// Nbytes of pps:
// pictureParameterSetNALUnit
int nb_packet = 5
+ 3 + (int)context->h264_sps.length()
+ 3 + (int)context->h264_pps.length();
char* packet = new char[nb_packet];
SrsAutoFree(char, packet);
// use stream to generate the h264 packet.
SrsStream stream;
if ((ret = stream.initialize(packet, nb_packet)) != ERROR_SUCCESS) {
return ret;
}
// decode the SPS:
// @see: 7.3.2.1.1, H.264-AVC-ISO_IEC_14496-10-2012.pdf, page 62
if (true) {
srs_assert((int)context->h264_sps.length() >= 4);
char* frame = (char*)context->h264_sps.data();
// @see: Annex A Profiles and levels, H.264-AVC-ISO_IEC_14496-10.pdf, page 205
// Baseline profile profile_idc is 66(0x42).
// Main profile profile_idc is 77(0x4d).
// Extended profile profile_idc is 88(0x58).
u_int8_t profile_idc = frame[1];
//u_int8_t constraint_set = frame[2];
u_int8_t level_idc = frame[3];
// generate the sps/pps header
// 5.3.4.2.1 Syntax, H.264-AVC-ISO_IEC_14496-15.pdf, page 16
// configurationVersion
stream.write_1bytes(0x01);
// AVCProfileIndication
stream.write_1bytes(profile_idc);
// profile_compatibility
stream.write_1bytes(0x00);
// AVCLevelIndication
stream.write_1bytes(level_idc);
// lengthSizeMinusOne, or NAL_unit_length, always use 4bytes size,
// so we always set it to 0x03.
stream.write_1bytes(0x03);
}
// sps
if (true) {
// 5.3.4.2.1 Syntax, H.264-AVC-ISO_IEC_14496-15.pdf, page 16
// numOfSequenceParameterSets, always 1
stream.write_1bytes(0x01);
// sequenceParameterSetLength
stream.write_2bytes(context->h264_sps.length());
// sequenceParameterSetNALUnit
stream.write_string(context->h264_sps);
}
// pps
if (true) {
// 5.3.4.2.1 Syntax, H.264-AVC-ISO_IEC_14496-15.pdf, page 16
// numOfPictureParameterSets, always 1
stream.write_1bytes(0x01);
// pictureParameterSetLength
stream.write_2bytes(context->h264_pps.length());
// pictureParameterSetNALUnit
stream.write_string(context->h264_pps);
}
// reset sps and pps.
context->h264_sps_changed = false;
context->h264_pps_changed = false;
context->h264_sps_pps_sent = true;
// TODO: FIXME: for more profile.
// 5.3.4.2.1 Syntax, H.264-AVC-ISO_IEC_14496-15.pdf, page 16
// profile_idc == 100 || profile_idc == 110 || profile_idc == 122 || profile_idc == 144
// send out h264 packet.
int8_t frame_type = SrsCodecVideoAVCFrameKeyFrame;
int8_t avc_packet_type = SrsCodecVideoAVCTypeSequenceHeader;
return __srs_write_h264_packet(
context, frame_type, avc_packet_type,
packet, nb_packet, dts, pts
);
}
/**
* write h264 IPB-frame.
*/
int __srs_write_h264_ipb_frame(Context* context,
char* data, int size, u_int32_t dts, u_int32_t pts
) {
int ret = ERROR_SUCCESS;
// when sps or pps not sent, ignore the packet.
// @see https://github.com/winlinvip/simple-rtmp-server/issues/203
if (!context->h264_sps_pps_sent) {
return ERROR_H264_DROP_BEFORE_SPS_PPS;
}
// 5bits, 7.3.1 NAL unit syntax,
// H.264-AVC-ISO_IEC_14496-10.pdf, page 44.
// 7: SPS, 8: PPS, 5: I Frame, 1: P Frame
u_int8_t nal_unit_type = (char)data[0] & 0x1f;
// 4bytes size of nalu:
// NALUnitLength
// Nbytes of nalu.
// NALUnit
int nb_packet = 4 + size;
char* packet = new char[nb_packet];
SrsAutoFree(char, packet);
// use stream to generate the h264 packet.
SrsStream stream;
if ((ret = stream.initialize(packet, nb_packet)) != ERROR_SUCCESS) {
return ret;
}
// 5.3.4.2.1 Syntax, H.264-AVC-ISO_IEC_14496-15.pdf, page 16
// lengthSizeMinusOne, or NAL_unit_length, always use 4bytes size
u_int32_t NAL_unit_length = size;
// mux the avc NALU in "ISO Base Media File Format"
// from H.264-AVC-ISO_IEC_14496-15.pdf, page 20
// NALUnitLength
stream.write_4bytes(NAL_unit_length);
// NALUnit
stream.write_bytes(data, size);
// send out h264 packet.
int8_t frame_type = SrsCodecVideoAVCFrameInterFrame;
if (nal_unit_type != 1) {
frame_type = SrsCodecVideoAVCFrameKeyFrame;
}
int8_t avc_packet_type = SrsCodecVideoAVCTypeNALU;
return __srs_write_h264_packet(
context, frame_type, avc_packet_type,
packet, nb_packet, dts, pts
);
return ret;
}
/**
* write h264 raw frame, maybe sps/pps/IPB-frame.
*/
int __srs_write_h264_raw_frame(Context* context,
char* frame, int frame_size, u_int32_t dts, u_int32_t pts
) {
int ret = ERROR_SUCCESS;
// ignore invalid frame,
// atleast 1bytes for SPS to decode the type
if (frame_size < 1) {
return ret;
}
// 5bits, 7.3.1 NAL unit syntax,
// H.264-AVC-ISO_IEC_14496-10.pdf, page 44.
// 7: SPS, 8: PPS, 5: I Frame, 1: P Frame
u_int8_t nal_unit_type = (char)frame[0] & 0x1f;
if (nal_unit_type == 7) {
// atleast 1bytes for SPS to decode the type, profile, constrain and level.
if (frame_size < 4) {
return ret;
}
std::string sps;
sps.append(frame, frame_size);
if (context->h264_sps == sps) {
return ERROR_H264_DUPLICATED_SPS;
}
context->h264_sps_changed = true;
context->h264_sps = sps;
return __srs_write_h264_sps_pps(context, dts, pts);
} else if (nal_unit_type == 8) {
std::string pps;
pps.append(frame, frame_size);
if (context->h264_pps == pps) {
return ERROR_H264_DUPLICATED_PPS;
}
context->h264_pps_changed = true;
context->h264_pps = pps;
return __srs_write_h264_sps_pps(context, dts, pts);
} else {
return __srs_write_h264_ipb_frame(context, frame, frame_size, dts, pts);
}
return ret;
}
/**
* write h264 multiple frames, in annexb format.
*/
int srs_h264_write_raw_frames(srs_rtmp_t rtmp,
char* frames, int frames_size, u_int32_t dts, u_int32_t pts
) {
int ret = ERROR_SUCCESS;
srs_assert(frames != NULL);
srs_assert(frames_size > 0);
srs_assert(rtmp != NULL);
Context* context = (Context*)rtmp;
if ((ret = context->h264_raw_stream.initialize(frames, frames_size)) != ERROR_SUCCESS) {
return ret;
}
// use the last error
// @see https://github.com/winlinvip/simple-rtmp-server/issues/203
// @see https://github.com/winlinvip/simple-rtmp-server/issues/204
int error_code_return = ret;
// send each frame.
while (!context->h264_raw_stream.empty()) {
// each frame must prefixed by annexb format.
// about annexb, @see H.264-AVC-ISO_IEC_14496-10.pdf, page 211.
int pnb_start_code = 0;
if (!srs_avc_startswith_annexb(&context->h264_raw_stream, &pnb_start_code)) {
return ERROR_H264_API_NO_PREFIXED;
}
int start = context->h264_raw_stream.pos() + pnb_start_code;
// find the last frame prefixed by annexb format.
context->h264_raw_stream.skip(pnb_start_code);
while (!context->h264_raw_stream.empty()) {
if (srs_avc_startswith_annexb(&context->h264_raw_stream, NULL)) {
break;
}
context->h264_raw_stream.skip(1);
}
int size = context->h264_raw_stream.pos() - start;
// send out the frame.
char* frame = context->h264_raw_stream.data() + start;
// it may be return error, but we must process all packets.
if ((ret = __srs_write_h264_raw_frame(context, frame, size, dts, pts)) != ERROR_SUCCESS) {
error_code_return = ret;
// ignore known error, process all packets.
if (srs_h264_is_dvbsp_error(ret)
|| srs_h264_is_duplicated_sps_error(ret)
|| srs_h264_is_duplicated_pps_error(ret)
) {
continue;
}
return ret;
}
}
return error_code_return;
}
srs_h264_bool srs_h264_is_dvbsp_error(int error_code)
{
return error_code == ERROR_H264_DROP_BEFORE_SPS_PPS;
}
srs_h264_bool srs_h264_is_duplicated_sps_error(int error_code)
{
return error_code == ERROR_H264_DUPLICATED_SPS;
}
srs_h264_bool srs_h264_is_duplicated_pps_error(int error_code)
{
return error_code == ERROR_H264_DUPLICATED_PPS;
}
int srs_h264_startswith_annexb(char* h264_raw_data, int h264_raw_size, int* pnb_start_code)
{
SrsStream stream;
if (stream.initialize(h264_raw_data, h264_raw_size) != ERROR_SUCCESS) {
return false;
}
return srs_avc_startswith_annexb(&stream, pnb_start_code);
}
int64_t srs_utils_get_time_ms()
{
srs_update_system_time_ms();
... ...
... ... @@ -264,164 +264,6 @@ extern int srs_rtmp_write_packet(srs_rtmp_t rtmp,
/*************************************************************
**************************************************************
* flv codec
* @example /trunk/research/librtmp/srs_flv_injecter.c
* @example /trunk/research/librtmp/srs_flv_parser.c
* @example /trunk/research/librtmp/srs_ingest_flv.c
* @example /trunk/research/librtmp/srs_ingest_rtmp.c
**************************************************************
*************************************************************/
typedef void* srs_flv_t;
typedef int srs_flv_bool;
/* open flv file for both read/write. */
extern srs_flv_t srs_flv_open_read(const char* file);
extern srs_flv_t srs_flv_open_write(const char* file);
extern void srs_flv_close(srs_flv_t flv);
/**
* read the flv header. 9bytes header.
* @param header, @see E.2 The FLV header, flv_v10_1.pdf in SRS doc.
* 3bytes, signature, "FLV",
* 1bytes, version, 0x01,
* 1bytes, flags, UB[5] 0, UB[1] audio present, UB[1] 0, UB[1] video present.
* 4bytes, dataoffset, 0x09, The length of this header in bytes
*
* @return 0, success; otherswise, failed.
* @remark, drop the 4bytes zero previous tag size.
*/
extern int srs_flv_read_header(srs_flv_t flv, char header[9]);
/**
* read the flv tag header, 1bytes tag, 3bytes data_size,
* 4bytes time, 3bytes stream id.
* @param ptype, output the type of tag, macros:
* SRS_RTMP_TYPE_AUDIO, FlvTagAudio
* SRS_RTMP_TYPE_VIDEO, FlvTagVideo
* SRS_RTMP_TYPE_SCRIPT, FlvTagScript
* @param pdata_size, output the size of tag data.
* @param ptime, output the time of tag, the dts in ms.
*
* @return 0, success; otherswise, failed.
* @remark, user must ensure the next is a tag, srs never check it.
*/
extern int srs_flv_read_tag_header(srs_flv_t flv,
char* ptype, int32_t* pdata_size, u_int32_t* ptime
);
/**
* read the tag data. drop the 4bytes previous tag size
* @param data, the data to read, user alloc and free it.
* @param size, the size of data to read, get by srs_flv_read_tag_header().
* @remark, srs will ignore and drop the 4bytes previous tag size.
*/
extern int srs_flv_read_tag_data(srs_flv_t flv, char* data, int32_t size);
/**
* write the flv header. 9bytes header.
* @param header, @see E.2 The FLV header, flv_v10_1.pdf in SRS doc.
* 3bytes, signature, "FLV",
* 1bytes, version, 0x01,
* 1bytes, flags, UB[5] 0, UB[1] audio present, UB[1] 0, UB[1] video present.
* 4bytes, dataoffset, 0x09, The length of this header in bytes
*
* @return 0, success; otherswise, failed.
* @remark, auto write the 4bytes zero previous tag size.
*/
extern int srs_flv_write_header(srs_flv_t flv, char header[9]);
/**
* write the flv tag to file.
*
* @return 0, success; otherswise, failed.
* @remark, auto write the 4bytes zero previous tag size.
*/
/* write flv tag to file, auto write the 4bytes previous tag size */
extern int srs_flv_write_tag(srs_flv_t flv,
char type, int32_t time, char* data, int size
);
/**
* get the tag size, for flv injecter to adjust offset,
* size = tag_header(11B) + data_size + previous_tag(4B)
* @return the size of tag.
*/
extern int srs_flv_size_tag(int data_size);
/* file stream */
/* file stream tellg to get offset */
extern int64_t srs_flv_tellg(srs_flv_t flv);
/* seek file stream, offset is form the start of file */
extern void srs_flv_lseek(srs_flv_t flv, int64_t offset);
/* error code */
/* whether the error code indicates EOF */
extern srs_flv_bool srs_flv_is_eof(int error_code);
/* media codec */
/**
* whether the video body is sequence header
* @param data, the data of tag, read by srs_flv_read_tag_data().
* @param size, the size of tag, read by srs_flv_read_tag_data().
*/
extern srs_flv_bool srs_flv_is_sequence_header(char* data, int32_t size);
/**
* whether the video body is keyframe
* @param data, the data of tag, read by srs_flv_read_tag_data().
* @param size, the size of tag, read by srs_flv_read_tag_data().
*/
extern srs_flv_bool srs_flv_is_keyframe(char* data, int32_t size);
/*************************************************************
**************************************************************
* amf0 codec
* @example /trunk/research/librtmp/srs_ingest_flv.c
* @example /trunk/research/librtmp/srs_ingest_rtmp.c
**************************************************************
*************************************************************/
/* the output handler. */
typedef void* srs_amf0_t;
typedef int srs_amf0_bool;
typedef double srs_amf0_number;
/**
* parse amf0 from data.
* @param nparsed, the parsed size, NULL to ignore.
* @return the parsed amf0 object. NULL for error.
*/
extern srs_amf0_t srs_amf0_parse(char* data, int size, int* nparsed);
extern srs_amf0_t srs_amf0_create_number(srs_amf0_number value);
extern srs_amf0_t srs_amf0_create_ecma_array();
extern srs_amf0_t srs_amf0_create_strict_array();
extern srs_amf0_t srs_amf0_create_object();
extern void srs_amf0_free(srs_amf0_t amf0);
extern void srs_amf0_free_bytes(char* data);
/* size and to bytes */
extern int srs_amf0_size(srs_amf0_t amf0);
extern int srs_amf0_serialize(srs_amf0_t amf0, char* data, int size);
/* type detecter */
extern srs_amf0_bool srs_amf0_is_string(srs_amf0_t amf0);
extern srs_amf0_bool srs_amf0_is_boolean(srs_amf0_t amf0);
extern srs_amf0_bool srs_amf0_is_number(srs_amf0_t amf0);
extern srs_amf0_bool srs_amf0_is_null(srs_amf0_t amf0);
extern srs_amf0_bool srs_amf0_is_object(srs_amf0_t amf0);
extern srs_amf0_bool srs_amf0_is_ecma_array(srs_amf0_t amf0);
extern srs_amf0_bool srs_amf0_is_strict_array(srs_amf0_t amf0);
/* value converter */
extern const char* srs_amf0_to_string(srs_amf0_t amf0);
extern srs_amf0_bool srs_amf0_to_boolean(srs_amf0_t amf0);
extern srs_amf0_number srs_amf0_to_number(srs_amf0_t amf0);
/* value setter */
extern void srs_amf0_set_number(srs_amf0_t amf0, srs_amf0_number value);
/* object value converter */
extern int srs_amf0_object_property_count(srs_amf0_t amf0);
extern const char* srs_amf0_object_property_name_at(srs_amf0_t amf0, int index);
extern srs_amf0_t srs_amf0_object_property_value_at(srs_amf0_t amf0, int index);
extern srs_amf0_t srs_amf0_object_property(srs_amf0_t amf0, const char* name);
extern void srs_amf0_object_property_set(srs_amf0_t amf0, const char* name, srs_amf0_t value);
extern void srs_amf0_object_clear(srs_amf0_t amf0);
/* ecma array value converter */
extern int srs_amf0_ecma_array_property_count(srs_amf0_t amf0);
extern const char* srs_amf0_ecma_array_property_name_at(srs_amf0_t amf0, int index);
extern srs_amf0_t srs_amf0_ecma_array_property_value_at(srs_amf0_t amf0, int index);
extern srs_amf0_t srs_amf0_ecma_array_property(srs_amf0_t amf0, const char* name);
extern void srs_amf0_ecma_array_property_set(srs_amf0_t amf0, const char* name, srs_amf0_t value);
/* strict array value converter */
extern int srs_amf0_strict_array_property_count(srs_amf0_t amf0);
extern srs_amf0_t srs_amf0_strict_array_property_at(srs_amf0_t amf0, int index);
extern void srs_amf0_strict_array_append(srs_amf0_t amf0, srs_amf0_t value);
/*************************************************************
**************************************************************
* audio raw codec
**************************************************************
*************************************************************/
... ... @@ -585,6 +427,164 @@ extern int srs_h264_startswith_annexb(
/*************************************************************
**************************************************************
* flv codec
* @example /trunk/research/librtmp/srs_flv_injecter.c
* @example /trunk/research/librtmp/srs_flv_parser.c
* @example /trunk/research/librtmp/srs_ingest_flv.c
* @example /trunk/research/librtmp/srs_ingest_rtmp.c
**************************************************************
*************************************************************/
typedef void* srs_flv_t;
typedef int srs_flv_bool;
/* open flv file for both read/write. */
extern srs_flv_t srs_flv_open_read(const char* file);
extern srs_flv_t srs_flv_open_write(const char* file);
extern void srs_flv_close(srs_flv_t flv);
/**
* read the flv header. 9bytes header.
* @param header, @see E.2 The FLV header, flv_v10_1.pdf in SRS doc.
* 3bytes, signature, "FLV",
* 1bytes, version, 0x01,
* 1bytes, flags, UB[5] 0, UB[1] audio present, UB[1] 0, UB[1] video present.
* 4bytes, dataoffset, 0x09, The length of this header in bytes
*
* @return 0, success; otherswise, failed.
* @remark, drop the 4bytes zero previous tag size.
*/
extern int srs_flv_read_header(srs_flv_t flv, char header[9]);
/**
* read the flv tag header, 1bytes tag, 3bytes data_size,
* 4bytes time, 3bytes stream id.
* @param ptype, output the type of tag, macros:
* SRS_RTMP_TYPE_AUDIO, FlvTagAudio
* SRS_RTMP_TYPE_VIDEO, FlvTagVideo
* SRS_RTMP_TYPE_SCRIPT, FlvTagScript
* @param pdata_size, output the size of tag data.
* @param ptime, output the time of tag, the dts in ms.
*
* @return 0, success; otherswise, failed.
* @remark, user must ensure the next is a tag, srs never check it.
*/
extern int srs_flv_read_tag_header(srs_flv_t flv,
char* ptype, int32_t* pdata_size, u_int32_t* ptime
);
/**
* read the tag data. drop the 4bytes previous tag size
* @param data, the data to read, user alloc and free it.
* @param size, the size of data to read, get by srs_flv_read_tag_header().
* @remark, srs will ignore and drop the 4bytes previous tag size.
*/
extern int srs_flv_read_tag_data(srs_flv_t flv, char* data, int32_t size);
/**
* write the flv header. 9bytes header.
* @param header, @see E.2 The FLV header, flv_v10_1.pdf in SRS doc.
* 3bytes, signature, "FLV",
* 1bytes, version, 0x01,
* 1bytes, flags, UB[5] 0, UB[1] audio present, UB[1] 0, UB[1] video present.
* 4bytes, dataoffset, 0x09, The length of this header in bytes
*
* @return 0, success; otherswise, failed.
* @remark, auto write the 4bytes zero previous tag size.
*/
extern int srs_flv_write_header(srs_flv_t flv, char header[9]);
/**
* write the flv tag to file.
*
* @return 0, success; otherswise, failed.
* @remark, auto write the 4bytes zero previous tag size.
*/
/* write flv tag to file, auto write the 4bytes previous tag size */
extern int srs_flv_write_tag(srs_flv_t flv,
char type, int32_t time, char* data, int size
);
/**
* get the tag size, for flv injecter to adjust offset,
* size = tag_header(11B) + data_size + previous_tag(4B)
* @return the size of tag.
*/
extern int srs_flv_size_tag(int data_size);
/* file stream */
/* file stream tellg to get offset */
extern int64_t srs_flv_tellg(srs_flv_t flv);
/* seek file stream, offset is form the start of file */
extern void srs_flv_lseek(srs_flv_t flv, int64_t offset);
/* error code */
/* whether the error code indicates EOF */
extern srs_flv_bool srs_flv_is_eof(int error_code);
/* media codec */
/**
* whether the video body is sequence header
* @param data, the data of tag, read by srs_flv_read_tag_data().
* @param size, the size of tag, read by srs_flv_read_tag_data().
*/
extern srs_flv_bool srs_flv_is_sequence_header(char* data, int32_t size);
/**
* whether the video body is keyframe
* @param data, the data of tag, read by srs_flv_read_tag_data().
* @param size, the size of tag, read by srs_flv_read_tag_data().
*/
extern srs_flv_bool srs_flv_is_keyframe(char* data, int32_t size);
/*************************************************************
**************************************************************
* amf0 codec
* @example /trunk/research/librtmp/srs_ingest_flv.c
* @example /trunk/research/librtmp/srs_ingest_rtmp.c
**************************************************************
*************************************************************/
/* the output handler. */
typedef void* srs_amf0_t;
typedef int srs_amf0_bool;
typedef double srs_amf0_number;
/**
* parse amf0 from data.
* @param nparsed, the parsed size, NULL to ignore.
* @return the parsed amf0 object. NULL for error.
*/
extern srs_amf0_t srs_amf0_parse(char* data, int size, int* nparsed);
extern srs_amf0_t srs_amf0_create_number(srs_amf0_number value);
extern srs_amf0_t srs_amf0_create_ecma_array();
extern srs_amf0_t srs_amf0_create_strict_array();
extern srs_amf0_t srs_amf0_create_object();
extern void srs_amf0_free(srs_amf0_t amf0);
extern void srs_amf0_free_bytes(char* data);
/* size and to bytes */
extern int srs_amf0_size(srs_amf0_t amf0);
extern int srs_amf0_serialize(srs_amf0_t amf0, char* data, int size);
/* type detecter */
extern srs_amf0_bool srs_amf0_is_string(srs_amf0_t amf0);
extern srs_amf0_bool srs_amf0_is_boolean(srs_amf0_t amf0);
extern srs_amf0_bool srs_amf0_is_number(srs_amf0_t amf0);
extern srs_amf0_bool srs_amf0_is_null(srs_amf0_t amf0);
extern srs_amf0_bool srs_amf0_is_object(srs_amf0_t amf0);
extern srs_amf0_bool srs_amf0_is_ecma_array(srs_amf0_t amf0);
extern srs_amf0_bool srs_amf0_is_strict_array(srs_amf0_t amf0);
/* value converter */
extern const char* srs_amf0_to_string(srs_amf0_t amf0);
extern srs_amf0_bool srs_amf0_to_boolean(srs_amf0_t amf0);
extern srs_amf0_number srs_amf0_to_number(srs_amf0_t amf0);
/* value setter */
extern void srs_amf0_set_number(srs_amf0_t amf0, srs_amf0_number value);
/* object value converter */
extern int srs_amf0_object_property_count(srs_amf0_t amf0);
extern const char* srs_amf0_object_property_name_at(srs_amf0_t amf0, int index);
extern srs_amf0_t srs_amf0_object_property_value_at(srs_amf0_t amf0, int index);
extern srs_amf0_t srs_amf0_object_property(srs_amf0_t amf0, const char* name);
extern void srs_amf0_object_property_set(srs_amf0_t amf0, const char* name, srs_amf0_t value);
extern void srs_amf0_object_clear(srs_amf0_t amf0);
/* ecma array value converter */
extern int srs_amf0_ecma_array_property_count(srs_amf0_t amf0);
extern const char* srs_amf0_ecma_array_property_name_at(srs_amf0_t amf0, int index);
extern srs_amf0_t srs_amf0_ecma_array_property_value_at(srs_amf0_t amf0, int index);
extern srs_amf0_t srs_amf0_ecma_array_property(srs_amf0_t amf0, const char* name);
extern void srs_amf0_ecma_array_property_set(srs_amf0_t amf0, const char* name, srs_amf0_t value);
/* strict array value converter */
extern int srs_amf0_strict_array_property_count(srs_amf0_t amf0);
extern srs_amf0_t srs_amf0_strict_array_property_at(srs_amf0_t amf0, int index);
extern void srs_amf0_strict_array_append(srs_amf0_t amf0, srs_amf0_t value);
/*************************************************************
**************************************************************
* utilities
**************************************************************
*************************************************************/
... ...