#ifdef _WIN32 #include "stdafx.h" #endif #include "FFmpegWriter.h" #include #include #include #include #define STREAM_DURATION 10.0 #define STREAM_FRAME_RATE 25 /* 25 images/s */ #define STREAM_PIX_FMT AV_PIX_FMT_YUV420P /* default pix_fmt */ #define SCALE_FLAGS SWS_BICUBIC // a wrapper around a single output AVStream struct OutputStream_t { AVStream *st; AVCodecContext *enc; /* pts of the next frame that will be generated */ int64_t next_pts; int samples_count; AVFrame *frame; AVFrame *tmp_frame; struct SwsContext *sws_ctx; struct SwrContext *swr_ctx; }; char av_ts_string[AV_TS_MAX_STRING_SIZE] = { 0 }; #define av_ts2str(ts) av_ts_make_string(av_ts_string, ts) char av_ts_buff[AV_TS_MAX_STRING_SIZE] = { 0 }; #define av_ts2timestr(ts, tb) av_ts_make_time_string(av_ts_buff, ts, tb) static void log_packet(const AVFormatContext *fmt_ctx, const AVPacket *pkt, LogApi* pLogApi) { AVRational *time_base = &fmt_ctx->streams[pkt->stream_index]->time_base; //pLogApi->Debug("pts:%s pts_time:%s dts:%s dts_time:%s duration:%s duration_time:%s stream_index:%d", // av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, time_base), // av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, time_base), // av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, time_base), // pkt->stream_index); } static void log_callback(void* ptr, int level, const char* fmt, va_list vl) { // va_list vl2; // char line[1024] = {0}; // static int print_prefix = 1; // va_copy(vl2, vl); // av_log_default_callback(ptr, level, fmt, vl); // av_log_format_line(ptr, level, fmt, vl2, line, sizeof(line), &print_prefix); // va_end(vl2); AVClassCategory type = av_default_get_category(ptr); if (AV_CLASS_CATEGORY_ENCODER == type) { AVCodecContext* c = (AVCodecContext*)ptr; if (c != NULL) { LogApi* pLogApi = (LogApi*)c->opaque; if (pLogApi != NULL) { pLogApi->vDebug(fmt, vl); } } } //if (report_file_level >= level) { // fputs(line, report_file); // fflush(report_file); //} } static int write_frame(AVFormatContext *fmt_ctx, const AVRational *time_base, AVStream *st, AVPacket *pkt, LogApi* pLogApi) { /* rescale output packet timestamp values from codec to stream timebase */ av_packet_rescale_ts(pkt, *time_base, st->time_base); pkt->stream_index = st->index; /* Write the compressed frame to the media file. */ log_packet(fmt_ctx, pkt, pLogApi); return av_interleaved_write_frame(fmt_ctx, pkt); } /* Add an output stream. */ static bool add_stream(LogApi* pLogApi, OutputStream *ost, AVFormatContext *oc, AVCodec **codec, enum AVCodecID codec_id, int width, int height, int colorbit, int nfps, int nSamplePsec, int nchannels) { /* find the encoder */ *codec = avcodec_find_encoder(codec_id); if (!(*codec)) { pLogApi->Debug("add_stream failed for Could not find encoder for %s.", avcodec_get_name(codec_id)); return false; } ost->st = avformat_new_stream(oc, NULL); if (!ost->st) { return false; } ost->st->id = oc->nb_streams-1; AVCodecContext* enc_ctx = avcodec_alloc_context3(*codec); if (!enc_ctx) { pLogApi->Debug("add_stream failed for Could not alloc an encoding context!"); return false ; } ost->enc = enc_ctx; switch ((*codec)->type) { case AVMEDIA_TYPE_AUDIO: { enc_ctx->sample_fmt = (*codec)->sample_fmts ? (*codec)->sample_fmts[0] : AV_SAMPLE_FMT_FLTP; enc_ctx->sample_rate = nSamplePsec; if ((*codec)->supported_samplerates) { for (int i = 0; (*codec)->supported_samplerates[i]; i++) { //pLogApi->Debug("(*codec)->supported_samplerates[%d] = %d.", i, (*codec)->supported_samplerates[i]); } } if (nchannels == 2){ enc_ctx->channel_layout = AV_CH_LAYOUT_STEREO; enc_ctx->channels = av_get_channel_layout_nb_channels(enc_ctx->channel_layout); } else if (nchannels == 1){ enc_ctx->channel_layout = AV_CH_LAYOUT_MONO; enc_ctx->channels = av_get_channel_layout_nb_channels(enc_ctx->channel_layout); } if ((*codec)->channel_layouts) { enc_ctx->channel_layout = (*codec)->channel_layouts[0]; for (int i = 0; (*codec)->channel_layouts[i]; i++) { if ((*codec)->channel_layouts[i] == AV_CH_LAYOUT_STEREO) { enc_ctx->channel_layout = AV_CH_LAYOUT_STEREO; } } } enc_ctx->channels = av_get_channel_layout_nb_channels(enc_ctx->channel_layout); AVRational tb = { 1, enc_ctx->sample_rate }; ost->st->time_base = tb; } break; case AVMEDIA_TYPE_VIDEO: { enc_ctx->codec_id = codec_id; //c->bit_rate = 400000; /* Resolution must be a multiple of two. */ enc_ctx->width = width; enc_ctx->height = height; /* timebase: This is the fundamental unit of time (in seconds) in terms * of which frame timestamps are represented. For fixed-fps content, * timebase should be 1/framerate and timestamp increments should be * identical to 1. */ AVRational time_rb = { 1, nfps }; //ost->st->time_base = time_rb; //AVRational nfps_rb = { nfps, 1 }; //ost->st->avg_frame_rate = nfps_rb; //enc_ctx->framerate = nfps_rb; enc_ctx->time_base = time_rb; //c->gop_size = 12; /* emit one intra frame every twelve frames at most */ enc_ctx->pix_fmt = STREAM_PIX_FMT; if (enc_ctx->codec_id == AV_CODEC_ID_MPEG2VIDEO) { /* just for testing, we also add B-frames */ enc_ctx->max_b_frames = 2; } if (enc_ctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) { /* Needed to avoid using macroblocks in which some coeffs overflow. * This does not happen with normal video, it just happens here as * the motion of the chroma plane does not match the luma plane. */ enc_ctx->mb_decision = 2; } } av_opt_set(enc_ctx->priv_data, "preset", "superfast", 0); av_opt_set(enc_ctx->priv_data, "tune", "zerolatency", 0); break; default: break; } /* Some formats want stream headers to be separate. */ if (oc->oformat->flags & AVFMT_GLOBALHEADER) { enc_ctx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; } //pLogApi->Debug("add_stream success get encoder for '%s'", avcodec_get_name(codec_id)); return true; } /**************************************************************/ /* audio output */ static AVFrame *alloc_audio_frame(enum AVSampleFormat sample_fmt, uint64_t channel_layout, int sample_rate, int nb_samples) { AVFrame *frame = av_frame_alloc(); int ret = -1; if (!frame) { return NULL; } frame->format = sample_fmt; frame->channel_layout = channel_layout; frame->sample_rate = sample_rate; frame->nb_samples = nb_samples; if (nb_samples) { ret = av_frame_get_buffer(frame, 0); if (ret < 0) { av_frame_free(&frame); return NULL; } } return frame; } static bool open_audio(LogApi* pLogApi, AVFormatContext *oc, AVCodec *codec, OutputStream *ost, AVDictionary *opt_arg, enum AVSampleFormat in_sample_fmt) { AVCodecContext *c = NULL; int nb_samples = 0; int ret = -1; AVDictionary *opt = NULL; c = ost->enc; c->opaque = pLogApi; /* open it */ av_dict_copy(&opt, opt_arg, 0); ret = avcodec_open2(c, codec, &opt); av_dict_free(&opt); if (ret < 0) { pLogApi->Debug("open_audio failed for could not open audio codec: %s, ret: %d.", avcodec_get_name(codec->id), ret); return false; } if (c->codec->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE) { nb_samples = 10000; } else { nb_samples = c->frame_size; } ost->frame = alloc_audio_frame(c->sample_fmt, c->channel_layout, c->sample_rate, nb_samples); ost->tmp_frame = alloc_audio_frame(in_sample_fmt, c->channel_layout, c->sample_rate, nb_samples); /* copy the stream parameters to the muxer */ ret = avcodec_parameters_from_context(ost->st->codecpar, c); if (ret < 0) { pLogApi->Debug("open_audio failed for could not copy the stream parameters."); return false; } /* create resampler context */ ost->swr_ctx = swr_alloc(); if (!ost->swr_ctx) { pLogApi->Debug("open_audio failed for could not allocate resampler context."); return false; } /* set options */ av_opt_set_int(ost->swr_ctx, "in_channel_count", c->channels, 0); av_opt_set_int(ost->swr_ctx, "in_sample_rate", c->sample_rate, 0); av_opt_set_sample_fmt(ost->swr_ctx, "in_sample_fmt", in_sample_fmt, 0); av_opt_set_int(ost->swr_ctx, "out_channel_count", c->channels, 0); av_opt_set_int(ost->swr_ctx, "out_sample_rate", c->sample_rate, 0); av_opt_set_sample_fmt(ost->swr_ctx, "out_sample_fmt", c->sample_fmt, 0); /* initialize the resampling context */ if ((ret = swr_init(ost->swr_ctx)) < 0) { pLogApi->Debug("open_audio failed for failed to initialize the resampling context."); return false; } //pLogApi->Debug("open_audio success encoder for %s, nb_samples:%d.", avcodec_get_name(codec->id), nb_samples); return true; } /* Prepare a 16 bit dummy audio frame of 'frame_size' samples and * 'nb_channels' channels. */ static AVFrame *get_audio_frame(OutputStream *ost, ByteBuffer* audio_input_buffer) { AVFrame *frame = ost->tmp_frame; audio_input_buffer->getBytes(frame->data[0], av_samples_get_buffer_size(NULL, frame->channels, frame->nb_samples, (AVSampleFormat)frame->format, 0)); frame->pts = ost->next_pts; ost->next_pts += frame->nb_samples; return frame; } /* * encode one audio frame and send it to the muxer * return 1 when encoding is finished, 0 otherwise */ static int write_audio_frame(LogApi* pLogApi, AVFormatContext *oc, OutputStream *audio_ost, ByteBuffer* audio_input_buffer) { AVCodecContext *enc_ctx = NULL; AVPacket pkt = { 0 }; // data and size must be 0; AVFrame *frame = NULL; int ret = -1; int got_packet = 0; int dst_nb_samples = 0; av_init_packet(&pkt); enc_ctx = audio_ost->enc; frame = get_audio_frame(audio_ost, audio_input_buffer); if (frame) { /* convert samples from native format to destination codec format, using the resampler */ /* compute destination number of samples */ dst_nb_samples = av_rescale_rnd(swr_get_delay(audio_ost->swr_ctx, enc_ctx->sample_rate) + frame->nb_samples, enc_ctx->sample_rate, enc_ctx->sample_rate, AV_ROUND_UP); av_assert0(dst_nb_samples == frame->nb_samples); /* when we pass a frame to the encoder, it may keep a reference to it * internally; * make sure we do not overwrite it here */ ret = av_frame_make_writable(audio_ost->frame); if (ret < 0) { pLogApi->Debug("write_audio_frame failed for av_frame_make_writable: %d.", ret); return -1; } #ifdef RVC_OS_WIN //pLogApi->Debug("write_audio_frame nb_samples: %d, dst_nb_samples: %d, pts: %I64d", frame->nb_samples, dst_nb_samples, frame->pts); #else //pLogApi->Debug("write_audio_frame nb_samples: %d, dst_nb_samples: %d, pts: %lld", frame->nb_samples, dst_nb_samples, frame->pts); #endif /* convert to destination format */ ret = swr_convert(audio_ost->swr_ctx, audio_ost->frame->data, dst_nb_samples, (const uint8_t **)frame->data, frame->nb_samples); if (ret < 0) { pLogApi->Debug("write_audio_frame failed for Error while converting."); return -1; } frame = audio_ost->frame; AVRational rb = { 1, enc_ctx->sample_rate }; frame->pts = av_rescale_q(audio_ost->samples_count, rb, enc_ctx->time_base); audio_ost->samples_count += dst_nb_samples; #ifdef RVC_OS_WIN //pLogApi->Debug("write_audio_frame new nb_samples: %d, pts: %I64d", frame->nb_samples, frame->pts); #else //pLogApi->Debug("write_audio_frame new nb_samples: %d, pts: %lld", frame->nb_samples, frame->pts); #endif } ret = avcodec_encode_audio2(enc_ctx, &pkt, frame, &got_packet); //ret = avcodec_send_frame(c, frame); //if (ret < 0) { // pLogApi->Debug("ffmpeg_encoder_process Error sending the frame to the encoder"); //} //else { // got_packet = avcodec_receive_packet(c, &pkt); // if (got_packet < 0) { // pLogApi->Debug("avcodec_receive_packet failed."); // return got_packet; // } //} if (got_packet) { //pLogApi->Debug("write_audio_frame got_packet"); ret = write_frame(oc, &enc_ctx->time_base, audio_ost->st, &pkt, pLogApi); if (ret < 0) { pLogApi->Debug("write_audio_frame failed for Error while writing audio frame: %d.", ret); return -1; } } return (frame || got_packet) ? 0 : 1; } /**************************************************************/ /* video output */ static AVFrame *alloc_picture(enum AVPixelFormat pix_fmt, int width, int height) { AVFrame *picture = NULL; int ret = -1; picture = av_frame_alloc(); if (!picture) { return NULL; } picture->format = pix_fmt; picture->width = width; picture->height = height; /* allocate the buffers for the frame data */ ret = av_frame_get_buffer(picture, 32); if (ret < 0) { av_frame_free(&picture); return NULL; } return picture; } static bool open_video(LogApi* pLogApi, AVFormatContext *oc, AVCodec *codec, OutputStream *video_ost, AVDictionary *opt_arg, enum AVPixelFormat input_pix_fmt) { int ret = -1; AVCodecContext *enc_ctx = video_ost->enc; AVDictionary *opt = NULL; av_dict_copy(&opt, opt_arg, 0); //huchen add for msmpeg4v3 //av_dict_set(&opt, "lmin", "1180", 0); //av_dict_set(&opt, "lmax", "2360", 0); enc_ctx->bit_rate = 128*1000; //c->qmin = 16; //c->qmax = 30; //c->max_b_frames = 0; enc_ctx->opaque = pLogApi; /* open the codec */ ret = avcodec_open2(enc_ctx, codec, &opt); av_dict_free(&opt); if (ret < 0) { pLogApi->Debug("open_video failed for Could not open video codec: %s, ret :%d.", avcodec_get_name(codec->id), ret); return false; } /* allocate and init a re-usable frame */ video_ost->frame = alloc_picture(enc_ctx->pix_fmt, enc_ctx->width, enc_ctx->height); if (!video_ost->frame) { pLogApi->Debug("open_video failed for Could not allocate video frame."); return false; } /* If the output format is not input_pix_fmt, then a temporary input_pix_fmt * picture is needed too. It is then converted to the required * output format. */ video_ost->tmp_frame = NULL; if (enc_ctx->pix_fmt != input_pix_fmt) { video_ost->tmp_frame = alloc_picture(input_pix_fmt, enc_ctx->width, enc_ctx->height); if (!video_ost->tmp_frame) { pLogApi->Debug("Could not allocate temporary picture."); return false; } } /* copy the stream parameters to the muxer */ ret = avcodec_parameters_from_context(video_ost->st->codecpar, enc_ctx); if (ret < 0) { pLogApi->Debug("open_video failed for Could not copy the stream parameters."); return false; } //pLogApi->Debug("open_video success encoder for %s.", avcodec_get_name(codec->id)); //pLogApi->Debug("open_video success encoder output_fmt: %s.", av_get_pix_fmt_name(enc_ctx->pix_fmt)); //pLogApi->Debug("open_video success encoder input_fmt: %s.", av_get_pix_fmt_name(input_pix_fmt)); //pLogApi->Debug("open_video success encoder, video enc_ctx time_base num: %d.", enc_ctx->time_base.num); //pLogApi->Debug("open_video success encoder, video enc_ctx time_base den: %d.", enc_ctx->time_base.den); return true; } static AVFrame *get_video_frame(LogApi* pLogApi, OutputStream *video_ost, char *data, int len, AVPixelFormat input_pix_fmt) { AVCodecContext *enc_ctx = video_ost->enc; /* when we pass a frame to the encoder, it may keep a reference to it * internally; make sure we do not overwrite it here */ if (av_frame_make_writable(video_ost->frame) < 0) { return NULL; } if (enc_ctx->pix_fmt != input_pix_fmt) { /* we must convert it * to the codec pixel format if needed */ if (!video_ost->sws_ctx) { video_ost->sws_ctx = sws_getContext(enc_ctx->width, enc_ctx->height, input_pix_fmt, enc_ctx->width, enc_ctx->height, enc_ctx->pix_fmt, SCALE_FLAGS, NULL, NULL, NULL); if (!video_ost->sws_ctx) { return NULL; } } //copy //因videoqueue中视频均为rgb24位格式，默认为24bpp #ifdef _WIN32 for (int i = video_ost->tmp_frame->height -1, j = 0; i >= 0 && j < video_ost->tmp_frame->height; i--, j++){ memcpy(video_ost->tmp_frame->data[0] + j * video_ost->tmp_frame->linesize[0], data + i * video_ost->tmp_frame->width * 3, video_ost->tmp_frame->width * 3); } #else if (video_ost->tmp_frame->linesize[0] > video_ost->tmp_frame->width * 3) { for (int i = 0; i < video_ost->tmp_frame->height; i++) { memcpy(video_ost->tmp_frame->data[0] + i * video_ost->tmp_frame->linesize[0], data + i * video_ost->tmp_frame->width * 3, video_ost->tmp_frame->width * 3); } } else { memcpy(video_ost->tmp_frame->data[0], data, len); } #endif //convert sws_scale(video_ost->sws_ctx, (const uint8_t* const*)video_ost->tmp_frame->data, video_ost->tmp_frame->linesize, 0, enc_ctx->height, video_ost->frame->data, video_ost->frame->linesize); } else { //copy //因videoqueue中视频均为rgb24位格式，默认为24bpp #ifdef _WIN32 for (int i = video_ost->tmp_frame->height - 1, j = 0; i >= 0 && j < video_ost->tmp_frame->height; i--, j++){ memcpy(video_ost->tmp_frame->data[0] + j * video_ost->tmp_frame->linesize[0], data + i * video_ost->tmp_frame->width * 3, video_ost->tmp_frame->width * 3); } #else if (video_ost->tmp_frame->linesize[0] > video_ost->tmp_frame->width * 3) { for (int i = 0; i < video_ost->tmp_frame->height; i++) { memcpy(video_ost->tmp_frame->data[0] + i * video_ost->tmp_frame->linesize[0], data + i * video_ost->tmp_frame->width * 3, video_ost->tmp_frame->width * 3); } } else { memcpy(video_ost->tmp_frame->data[0], data, len); } #endif } video_ost->frame->pts = video_ost->next_pts++; //video_ost->frame->key_frame = 1; return video_ost->frame; } /* * encode one video frame and send it to the muxer * return 1 when encoding is finished, 0 otherwise */ static int write_video_frame(LogApi* pLogApi, AVFormatContext *oc, OutputStream *ost, char *data, int len, AVPixelFormat input_pix_fmt) { int ret = -1; AVCodecContext *enc_ctx = NULL; AVFrame *vframe = NULL; int got_packet = 0; AVPacket pkt = { 0 }; enc_ctx = ost->enc; vframe = get_video_frame(pLogApi, ost, data, len, input_pix_fmt); //pLogApi->Debug("get_video_frame pts = %d", vframe->pts); av_init_packet(&pkt); /* encode the image */ int iencoderet = avcodec_encode_video2(enc_ctx, &pkt, vframe, &got_packet); if (iencoderet < 0) { pLogApi->Debug("open_video failed for Error(%d) encoding video frame.", iencoderet); return -1; } else { //pLogApi->Debug("avcodec_encode_video2 success(%d) and got_packet ret = %d.", iencoderet, got_packet); } if (got_packet) { //pLogApi->Debug("write_video_frame got_packet"); ret = write_frame(oc, &enc_ctx->time_base, ost->st, &pkt, pLogApi); } else { ret = 0; } if (ret < 0) { pLogApi->Debug("open_video failed for Error while writing video frame: %d.", ret); return -1; } return (vframe || got_packet) ? 0 : 1; } static void close_stream(AVFormatContext *oc, OutputStream *ost) { avcodec_free_context(&ost->enc); av_frame_free(&ost->frame); av_frame_free(&ost->tmp_frame); sws_freeContext(ost->sws_ctx); swr_free(&ost->swr_ctx); } /**************************************************************/ /* media file output */ bool FFmpegWriter::InitWriter(char* filename, int width, int height, int colorbit, int nfps, int nSamplePsec, int nchannels, int nBitPerSample, int nmaxspacing, int nquality, int nOutBitRate, int iAudioType) { int iret = -1; AVDictionary *opt = NULL; bool result = true; if (nBitPerSample != 8 && nBitPerSample != 16 && nBitPerSample != 32){ m_pLogApi->Debug("Init FFmpegWriter Failed for BitPerSample = %d.", nBitPerSample); return false; } if (nchannels != 1 && nchannels != 2){ m_pLogApi->Debug("Init FFmpegWriter Failed for channels = %d.", nchannels); return false; } if (colorbit != 24){ m_pLogApi->Debug("Init FFmpegWriter Failed for colorbit = %d.", colorbit); return false; } if (colorbit == 24){ m_input_pix_fmt = AV_PIX_FMT_BGR24; } else { m_input_pix_fmt = STREAM_PIX_FMT; } /* allocate the output media context */ avformat_alloc_output_context2(&m_formatctx, NULL, NULL, filename); if (!m_formatctx) { m_pLogApi->Debug("Init FFmpegWriter Failed for avformat_alloc_output_context2, filename = %s.", filename); return false; } //av_log_set_level(AV_LOG_ERROR); //av_log_set_callback(log_callback); m_outfmt = m_formatctx->oformat; //m_pLogApi->Debug("real output format name of '%s' is %s, long_name is %s, mime_type is %s, extensions is %s.", filename, m_outfmt->name, m_outfmt->long_name, m_outfmt->mime_type, m_outfmt->extensions); m_video_st = new OutputStream(); m_audio_st = new OutputStream(); /* Add the audio and video streams using the default format codecs * and initialize the codecs. */ if (m_outfmt->video_codec != AV_CODEC_ID_NONE) { result = add_stream(m_pLogApi, m_video_st, m_formatctx, &m_video_codec, m_outfmt->video_codec, width, height, colorbit, nfps, nSamplePsec, nchannels); if (result == false){ Close(); m_pLogApi->Debug("Init FFmpegWriter Failed for add_stream, video_codec = %d.", m_outfmt->video_codec); return result; } m_bhave_video = true; } if (m_outfmt->audio_codec != AV_CODEC_ID_NONE) { result = add_stream(m_pLogApi, m_audio_st, m_formatctx, &m_audio_codec, m_outfmt->audio_codec, width, height, colorbit, nfps, nSamplePsec, nchannels); if (result == false){ Close(); m_pLogApi->Debug("Init FFmpegWriter Failed for add_stream, audio_codec = %d.", m_outfmt->audio_codec); return result; } m_bhave_audio = true; } /* Now that all the parameters are set, we can open the audio and * video codecs and allocate the necessary encode buffers. */ if (m_bhave_video){ result = open_video(m_pLogApi, m_formatctx, m_video_codec, m_video_st, opt, m_input_pix_fmt); if (result == false){ Close(); m_pLogApi->Debug("Init FFmpegWriter Failed for open_video, video_codec = %d.", m_outfmt->video_codec); return result; } } if (m_bhave_audio){ if (nBitPerSample == 8){ result = open_audio(m_pLogApi, m_formatctx, m_audio_codec, m_audio_st, opt, AV_SAMPLE_FMT_U8); if (result == false){ Close(); m_pLogApi->Debug("Init FFmpegWriter Failed for open_audio, AV_SAMPLE_FMT_U8."); return result; } }else if (nBitPerSample == 16){ result = open_audio(m_pLogApi, m_formatctx, m_audio_codec, m_audio_st, opt, AV_SAMPLE_FMT_S16); if (result == false){ Close(); m_pLogApi->Debug("Init FFmpegWriter Failed for open_audio, AV_SAMPLE_FMT_S16."); return result; } }else if (nBitPerSample == 32) { result = open_audio(m_pLogApi, m_formatctx, m_audio_codec, m_audio_st, opt, AV_SAMPLE_FMT_FLT); if (result == false) { Close(); m_pLogApi->Debug("Init FFmpegWriter Failed for open_audio, AV_SAMPLE_FMT_FLT."); return result; } } } av_dump_format(m_formatctx, 0, filename, 1); /* open the output file, if needed */ if (!(m_outfmt->flags & AVFMT_NOFILE)) { iret = avio_open(&m_formatctx->pb, filename, AVIO_FLAG_WRITE); if (iret < 0) { Close(); m_pLogApi->Debug("Init FFmpegWriter Failed for avio_open, %s.", filename); return false; } } m_audio_input_buffer = new ByteBuffer(3*nBitPerSample/8 * nchannels* nSamplePsec); m_pLogApi->Debug("Init FFmpegWriter success, audio_input_buffer:%d.", 3 * nBitPerSample / 8 * nchannels * nSamplePsec); m_bstart = false; return result; } bool FFmpegWriter::StartWrite() { AVDictionary *opt = NULL; /* Write the stream header, if any. */ int ret = avformat_write_header(m_formatctx, &opt); if (ret < 0) { m_pLogApi->Debug("StartWrite Failed when opening output file: %d.", ret); return false; } m_pLogApi->Debug("FFmpegWriter StartWrite success."); m_bstart = true; return true; } bool FFmpegWriter::StopWrite() { /* Write the trailer, if any. The trailer must be written before you * close the CodecContexts open when you wrote the header; otherwise * av_write_trailer() may try to use memory that was freed on * av_codec_close(). */ if (m_formatctx == NULL){ m_pLogApi->Debug("End Failed when oc is null."); return false; } if (m_bstart) { av_write_trailer(m_formatctx); } Close(); av_log_set_callback(NULL); m_bstart = false; m_pLogApi->Debug("FFmpegWriter End success."); return true; } void FFmpegWriter::Close() { /* Close each codec. */ if (m_bhave_video) { close_stream(m_formatctx, m_video_st); } if (m_bhave_audio) { close_stream(m_formatctx, m_audio_st); } if (!(m_outfmt->flags & AVFMT_NOFILE)) { /* Close the output file. */ avio_closep(&m_formatctx->pb); } /* free the stream */ if (m_formatctx) { avformat_free_context(m_formatctx); } if (m_video_st != NULL) { delete m_video_st; m_video_st = NULL; } if (m_audio_st != NULL) { delete m_audio_st; m_audio_st = NULL; } if (m_audio_input_buffer != NULL) { delete m_audio_input_buffer; m_audio_input_buffer = NULL; } m_pLogApi->Debug("FFmpegWriter Close success."); } bool FFmpegWriter::ReceiveAudioData(unsigned char* pData, unsigned long len) { if (m_formatctx == NULL || m_audio_st == NULL || !m_bhave_audio){ m_pLogApi->Debug("ReceiveAudioData Failed when oc is null."); return false; } //插入audio_input_buffer m_audio_input_buffer->putBytes(pData, len); AVFrame* frame = m_audio_st->tmp_frame; int frame_size = av_samples_get_buffer_size(NULL, frame->channels, frame->nb_samples, (AVSampleFormat)frame->format, 0); //m_pLogApi->Debug("ReceiveAudioData len:%d, available_data_len:%d, frame_size:%d.", len, audio_input_buffer->bytesRemaining(), frame_size); //循环写帧 while (frame_size <= m_audio_input_buffer->bytesRemaining()) { //m_pLogApi->Debug("ReceiveAudioData available_data_len:%d.", audio_input_buffer->bytesRemaining()); int result = write_audio_frame(m_pLogApi, m_formatctx, m_audio_st, m_audio_input_buffer); if (result < 0) { m_pLogApi->Debug("write_audio_frame Failed, %d.", result); return false; } } //重设置audio_input_buffer，避免buffer过大 uint8_t* tmp_buffer = new uint8_t[frame_size]; int bytesRemaining = m_audio_input_buffer->bytesRemaining(); m_audio_input_buffer->getBytes(tmp_buffer, bytesRemaining); m_audio_input_buffer->resize(bytesRemaining); m_audio_input_buffer->putBytes(tmp_buffer, bytesRemaining); delete tmp_buffer; return true; } bool FFmpegWriter::ReceiveVideoData(unsigned char* pData, unsigned long len) { if (m_formatctx == NULL || m_video_st == NULL || !m_bhave_video){ m_pLogApi->Debug("ReceiveVideoData Failed when oc is null."); return false; } //m_pLogApi->Debug("ReceiveVideoData len:%d", len); int result = write_video_frame(m_pLogApi, m_formatctx, m_video_st, (char*)pData, len, m_input_pix_fmt); if (result < 0){ m_pLogApi->Debug("write_video_frame Failed, %d.", result); return false; } return true; }