MediaRet MediaRecorder::Record(const char *fname) { if(oc) return MRET_ERR_RECORDING; aud_st = vid_st = NULL; AVOutputFormat *fmt = av_guess_format(NULL, fname, NULL); if(!fmt) fmt = av_guess_format("wav", NULL, NULL); if(!fmt || fmt->audio_codec == CODEC_ID_NONE) return MRET_ERR_FMTGUESS; MediaRet ret; if((ret = setup_sound_stream(fname, fmt)) == MRET_OK) ret = finish_setup(fname); return ret; }
MediaRet MediaRecorder::Record(const char *fname, int width, int height, int depth) { if(oc) return MRET_ERR_RECORDING; aud_st = vid_st = NULL; AVOutputFormat *fmt = av_guess_format(NULL, fname, NULL); if(!fmt) fmt = av_guess_format("avi", NULL, NULL); if(!fmt || fmt->video_codec == CODEC_ID_NONE) return MRET_ERR_FMTGUESS; MediaRet ret; if((ret = setup_sound_stream(fname, fmt)) == MRET_OK && (ret = setup_video_stream(fname, width, height, depth)) == MRET_OK) ret = finish_setup(fname); return ret; }
MediaRet MediaRecorder::setup_sound_stream(const char *fname, AVOutputFormat *fmt) { oc = avformat_alloc_context(); if(!oc) return MRET_ERR_NOMEM; oc->oformat = fmt; strncpy(oc->filename, fname, sizeof(oc->filename) - 1); oc->filename[sizeof(oc->filename) - 1] = 0; if(fmt->audio_codec == CODEC_ID_NONE) return MRET_OK; AVCodecContext *ctx; #if LIBAVFORMAT_VERSION_INT < AV_VERSION_INT(53,10,0) aud_st = av_new_stream(oc, 1); #else aud_st = avformat_new_stream(oc, NULL); #endif if(!aud_st) { avformat_free_context(oc); oc = NULL; return MRET_ERR_NOMEM; } AVCodec *codec = avcodec_find_encoder(fmt->audio_codec); ctx = aud_st->codec; ctx->codec_id = fmt->audio_codec; ctx->codec_type = AVMEDIA_TYPE_AUDIO; // Some encoders don't like int16_t (SAMPLE_FMT_S16) ctx->sample_fmt = codec->sample_fmts[0]; // This was changed in the initial ffmpeg 3.0 update, // but shouldn't (as far as I'm aware) cause problems with older versions ctx->bit_rate = 128000; // arbitrary; in case we're generating mp3 ctx->sample_rate = soundGetSampleRate(); ctx->channels = 2; ctx->time_base.den = 60; ctx->time_base.num = 1; if(fmt->flags & AVFMT_GLOBALHEADER) ctx->flags |= CODEC_FLAG_GLOBAL_HEADER; #if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(53,6,0) if(!codec || avcodec_open(ctx, codec)) { #else if(!codec || avcodec_open2(ctx, codec, NULL)) { #endif avformat_free_context(oc); oc = NULL; return MRET_ERR_NOCODEC; } return MRET_OK; } MediaRet MediaRecorder::setup_video_stream(const char *fname, int w, int h, int d) { AVCodecContext *ctx; #if LIBAVFORMAT_VERSION_INT < AV_VERSION_INT(53,10,0) vid_st = av_new_stream(oc, 0); #else vid_st = avformat_new_stream(oc, NULL); #endif if(!vid_st) { avformat_free_context(oc); oc = NULL; return MRET_ERR_NOMEM; } ctx = vid_st->codec; ctx->codec_id = oc->oformat->video_codec; ctx->codec_type = AVMEDIA_TYPE_VIDEO; ctx->width = w; ctx->height = h; ctx->time_base.den = 60; ctx->time_base.num = 1; // dunno if any of these help; some output just looks plain crappy // will have to investigate further ctx->bit_rate = 400000; ctx->gop_size = 12; ctx->max_b_frames = 2; switch(d) { case 16: // FIXME: test & make endian-neutral pixfmt = PIX_FMT_RGB565LE; break; case 24: pixfmt = PIX_FMT_RGB24; break; case 32: default: // should never be anything else pixfmt = PIX_FMT_RGBA; break; } ctx->pix_fmt = pixfmt; pixsize = d >> 3; linesize = pixsize * w; ctx->max_b_frames = 2; if(oc->oformat->flags & AVFMT_GLOBALHEADER) ctx->flags |= CODEC_FLAG_GLOBAL_HEADER; AVCodec *codec = avcodec_find_encoder(oc->oformat->video_codec); // make sure RGB is supported (mostly not) if(codec->pix_fmts) { const enum PixelFormat *p; #if LIBAVCODEC_VERSION_MAJOR < 55 int64_t mask = 0; #endif for(p = codec->pix_fmts; *p != -1; p++) { // may get complaints about 1LL; thus the cast #if LIBAVCODEC_VERSION_MAJOR < 55 mask |= ((int64_t)1) << *p; #endif if(*p == pixfmt) break; } if(*p == -1) { // if not supported, use a converter to the next best format // this is swscale, the converter used by the output demo #if LIBAVCODEC_VERSION_MAJOR < 55 enum PixelFormat dp = (PixelFormat)avcodec_find_best_pix_fmt(mask, pixfmt, 0, NULL); #else #if LIBAVCODEC_VERSION_MICRO >= 100 // FFmpeg enum AVPixelFormat dp = avcodec_find_best_pix_fmt_of_list(codec->pix_fmts, pixfmt, 0, NULL); #else // Libav enum AVPixelFormat dp = avcodec_find_best_pix_fmt2(codec->pix_fmts, pixfmt, 0, NULL); #endif #endif if(dp == -1) dp = codec->pix_fmts[0]; if(!(convpic = avcodec_alloc_frame()) || avpicture_alloc((AVPicture *)convpic, dp, w, h) < 0) { avformat_free_context(oc); oc = NULL; return MRET_ERR_NOMEM; } #if LIBSWSCALE_VERSION_INT < AV_VERSION_INT(0, 12, 0) converter = sws_getContext(w, h, pixfmt, w, h, dp, SWS_BICUBIC, NULL, NULL, NULL); #else converter = sws_alloc_context(); // what a convoluted, inefficient way to set options av_opt_set_int(converter, "sws_flags", SWS_BICUBIC, 0); av_opt_set_int(converter, "srcw", w, 0); av_opt_set_int(converter, "srch", h, 0); av_opt_set_int(converter, "dstw", w, 0); av_opt_set_int(converter, "dsth", h, 0); av_opt_set_int(converter, "src_format", pixfmt, 0); av_opt_set_int(converter, "dst_format", dp, 0); sws_init_context(converter, NULL, NULL); #endif ctx->pix_fmt = dp; } } #if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(53,6,0) if(!codec || avcodec_open(ctx, codec)) { #else if(!codec || avcodec_open2(ctx, codec, NULL)) { #endif avformat_free_context(oc); oc = NULL; return MRET_ERR_NOCODEC; } return MRET_OK; } MediaRet MediaRecorder::finish_setup(const char *fname) { if(audio_buf) free(audio_buf); if(audio_buf2) free(audio_buf2); audio_buf2 = NULL; in_audio_buf2 = 0; if(aud_st) { frame_len = aud_st->codec->frame_size * 4; sample_len = soundGetSampleRate() * 4 / 60; switch(aud_st->codec->codec_id) { case CODEC_ID_PCM_S16LE: case CODEC_ID_PCM_S16BE: case CODEC_ID_PCM_U16LE: case CODEC_ID_PCM_U16BE: frame_len = sample_len; } audio_buf = (uint8_t *)malloc(AUDIO_BUF_LEN); if(!audio_buf) { avformat_free_context(oc); oc = NULL; return MRET_ERR_NOMEM; } if(frame_len != sample_len && (frame_len > sample_len || sample_len % frame_len)) { audio_buf2 = (uint16_t *)malloc(frame_len); if(!audio_buf2) { avformat_free_context(oc); oc = NULL; return MRET_ERR_NOMEM; } } } else audio_buf = NULL; if(video_buf) free(video_buf); if(vid_st) { video_buf = (uint8_t *)malloc(VIDEO_BUF_LEN); if(!video_buf) { avformat_free_context(oc); oc = NULL; return MRET_ERR_NOMEM; } } else { video_buf = NULL; } if(!(oc->oformat->flags & AVFMT_NOFILE)) { if(avio_open(&oc->pb, fname, AVIO_FLAG_WRITE) < 0) { avformat_free_context(oc); oc = NULL; return MRET_ERR_FERR; } } avformat_write_header(oc, NULL); return MRET_OK; } MediaRet MediaRecorder::Record(const char *fname, int width, int height, int depth) { if(oc) return MRET_ERR_RECORDING; aud_st = vid_st = NULL; AVOutputFormat *fmt = av_guess_format(NULL, fname, NULL); if(!fmt) fmt = av_guess_format("avi", NULL, NULL); if(!fmt || fmt->video_codec == CODEC_ID_NONE) return MRET_ERR_FMTGUESS; MediaRet ret; if((ret = setup_sound_stream(fname, fmt)) == MRET_OK && (ret = setup_video_stream(fname, width, height, depth)) == MRET_OK) ret = finish_setup(fname); return ret; } MediaRet MediaRecorder::Record(const char *fname) { if(oc) return MRET_ERR_RECORDING; aud_st = vid_st = NULL; AVOutputFormat *fmt = av_guess_format(NULL, fname, NULL); if(!fmt) fmt = av_guess_format("wav", NULL, NULL); if(!fmt || fmt->audio_codec == CODEC_ID_NONE) return MRET_ERR_FMTGUESS; MediaRet ret; if((ret = setup_sound_stream(fname, fmt)) == MRET_OK) ret = finish_setup(fname); return ret; } void MediaRecorder::Stop() { if(oc) { if(in_audio_buf2) AddFrame((uint16_t *)0); av_write_trailer(oc); avformat_free_context(oc); oc = NULL; } if(audio_buf) { free(audio_buf); audio_buf = NULL; } if(video_buf) { free(video_buf); video_buf = NULL; } if(audio_buf2) { free(audio_buf2); audio_buf2 = NULL; } if(convpic) { avpicture_free((AVPicture *)convpic); av_free(convpic); convpic = NULL; } if(converter) { sws_freeContext(converter); converter = NULL; } } MediaRecorder::~MediaRecorder() { Stop(); } // Still needs updating for avcodec_encode_video2 MediaRet MediaRecorder::AddFrame(const uint8_t *vid) { if(!oc || !vid_st) return MRET_OK; AVCodecContext *ctx = vid_st->codec; AVPacket pkt; #if LIBAVCODEC_VERSION_MAJOR > 56 int ret, got_packet = 0; #endif // strip borders. inconsistent between depths for some reason // but fortunately consistent between gb/gba. int tbord, rbord; switch(pixsize) { case 2: // 16-bit: 2 @ right, 1 @ top tbord = 1; rbord = 2; break; case 3: // 24-bit: no border tbord = rbord = 0; break; case 4: // 32-bit: 1 @ right, 1 @ top tbord = 1; rbord = 1; break; } avpicture_fill((AVPicture *)pic, (uint8_t *)vid + tbord * (linesize + pixsize * rbord), (PixelFormat)pixfmt, ctx->width + rbord, ctx->height); // satisfy stupid sws_scale()'s integrity check pic->data[1] = pic->data[2] = pic->data[3] = pic->data[0]; pic->linesize[1] = pic->linesize[2] = pic->linesize[3] = pic->linesize[0]; AVFrame *f = pic; if(converter) { sws_scale(converter, pic->data, pic->linesize, 0, ctx->height, convpic->data, convpic->linesize); f = convpic; } av_init_packet(&pkt); pkt.stream_index = vid_st->index; if(oc->oformat->flags & AVFMT_RAWPICTURE) { // this won't work due to border // not sure what formats set this, anyway pkt.flags |= AV_PKT_FLAG_KEY; pkt.data = f->data[0]; pkt.size = linesize * ctx->height; } else { #if LIBAVCODEC_VERSION_MAJOR > 56 pkt.data = video_buf; pkt.size = VIDEO_BUF_LEN; f->format = ctx->pix_fmt; f->width = ctx->width; f->height = ctx->height; ret = avcodec_encode_video2(ctx, &pkt, f, &got_packet); if(!ret && got_packet && ctx->coded_frame) { ctx->coded_frame->pts = pkt.pts; ctx->coded_frame->key_frame = !!(pkt.flags & AV_PKT_FLAG_KEY); } #else pkt.size = avcodec_encode_video(ctx, video_buf, VIDEO_BUF_LEN, f); #endif if(!pkt.size) return MRET_OK; if(ctx->coded_frame && ctx->coded_frame->pts != AV_NOPTS_VALUE) pkt.pts = av_rescale_q(ctx->coded_frame->pts, ctx->time_base, vid_st->time_base); if(pkt.size > VIDEO_BUF_LEN) { avformat_free_context(oc); oc = NULL; return MRET_ERR_BUFSIZE; } if(ctx->coded_frame->key_frame) pkt.flags |= AV_PKT_FLAG_KEY; pkt.data = video_buf; } if(av_interleaved_write_frame(oc, &pkt) < 0) { avformat_free_context(oc); oc = NULL; // yeah, err might not be a file error, but if it isn't, it's a // coding error rather than a user-controllable error // and better resolved using debugging return MRET_ERR_FERR; } return MRET_OK; } #if LIBAVCODEC_VERSION_MAJOR > 56 /* FFmpeg depricated avcodec_encode_audio. * It was removed completely in 3.0. * This will at least get audio recording *working* */ static inline int MediaRecorderEncodeAudio(AVCodecContext *ctx, AVPacket *pkt, uint8_t *buf, int buf_size, const short *samples) { AVFrame *frame; av_init_packet(pkt); int ret, samples_size, got_packet = 0; pkt->data = buf; pkt->size = buf_size; if (samples) { frame = frame = av_frame_alloc(); if (ctx->frame_size) { frame->nb_samples = ctx->frame_size; } else { frame->nb_samples = (int64_t)buf_size * 8 / (av_get_bits_per_sample(ctx->codec_id) * ctx->channels); } frame->format = ctx->sample_fmt; frame->channel_layout = ctx->channel_layout; samples_size = av_samples_get_buffer_size(NULL, ctx->channels, frame->nb_samples, ctx->sample_fmt, 1); avcodec_fill_audio_frame(frame, ctx->channels, ctx->sample_fmt, (const uint8_t *)samples, samples_size, 1); //frame->pts = AV_NOPTS_VALUE; } else { frame = NULL; } ret = avcodec_encode_audio2(ctx, pkt, frame, &got_packet); if (!ret && got_packet && ctx->coded_frame) { ctx->coded_frame->pts = pkt->pts; ctx->coded_frame->key_frame = !!(pkt->flags & AV_PKT_FLAG_KEY); } if (frame && frame->extended_data != frame->data) av_freep(&frame->extended_data); return ret; }