static int libschroedinger_encode_frame(AVCodecContext *avccontext, AVPacket *pkt, const AVFrame *frame, int *got_packet) { int enc_size = 0; SchroEncoderParams *p_schro_params = avccontext->priv_data; SchroEncoder *encoder = p_schro_params->encoder; struct FFSchroEncodedFrame *p_frame_output = NULL; int go = 1; SchroBuffer *enc_buf; int presentation_frame; int parse_code; int last_frame_in_sequence = 0; int pkt_size, ret; if (!frame) { /* Push end of sequence if not already signalled. */ if (!p_schro_params->eos_signalled) { schro_encoder_end_of_stream(encoder); p_schro_params->eos_signalled = 1; } } else { /* Allocate frame data to schro input buffer. */ SchroFrame *in_frame = libschroedinger_frame_from_data(avccontext, frame); /* Load next frame. */ schro_encoder_push_frame(encoder, in_frame); } if (p_schro_params->eos_pulled) go = 0; /* Now check to see if we have any output from the encoder. */ while (go) { SchroStateEnum state; state = schro_encoder_wait(encoder); switch (state) { case SCHRO_STATE_HAVE_BUFFER: case SCHRO_STATE_END_OF_STREAM: enc_buf = schro_encoder_pull(encoder, &presentation_frame); assert(enc_buf->length > 0); assert(enc_buf->length <= buf_size); parse_code = enc_buf->data[4]; /* All non-frame data is prepended to actual frame data to * be able to set the pts correctly. So we don't write data * to the frame output queue until we actually have a frame */ p_schro_params->enc_buf = av_realloc(p_schro_params->enc_buf, p_schro_params->enc_buf_size + enc_buf->length); memcpy(p_schro_params->enc_buf + p_schro_params->enc_buf_size, enc_buf->data, enc_buf->length); p_schro_params->enc_buf_size += enc_buf->length; if (state == SCHRO_STATE_END_OF_STREAM) { p_schro_params->eos_pulled = 1; go = 0; } if (!SCHRO_PARSE_CODE_IS_PICTURE(parse_code)) { schro_buffer_unref(enc_buf); break; } /* Create output frame. */ p_frame_output = av_mallocz(sizeof(FFSchroEncodedFrame)); /* Set output data. */ p_frame_output->size = p_schro_params->enc_buf_size; p_frame_output->p_encbuf = p_schro_params->enc_buf; if (SCHRO_PARSE_CODE_IS_INTRA(parse_code) && SCHRO_PARSE_CODE_IS_REFERENCE(parse_code)) p_frame_output->key_frame = 1; /* Parse the coded frame number from the bitstream. Bytes 14 * through 17 represesent the frame number. */ p_frame_output->frame_num = AV_RB32(enc_buf->data + 13); ff_schro_queue_push_back(&p_schro_params->enc_frame_queue, p_frame_output); p_schro_params->enc_buf_size = 0; p_schro_params->enc_buf = NULL; schro_buffer_unref(enc_buf); break; case SCHRO_STATE_NEED_FRAME: go = 0; break; case SCHRO_STATE_AGAIN: break; default: av_log(avccontext, AV_LOG_ERROR, "Unknown Schro Encoder state\n"); return -1; } } /* Copy 'next' frame in queue. */ if (p_schro_params->enc_frame_queue.size == 1 && p_schro_params->eos_pulled) last_frame_in_sequence = 1; p_frame_output = ff_schro_queue_pop(&p_schro_params->enc_frame_queue); if (!p_frame_output) return 0; pkt_size = p_frame_output->size; if (last_frame_in_sequence && p_schro_params->enc_buf_size > 0) pkt_size += p_schro_params->enc_buf_size; if ((ret = ff_alloc_packet(pkt, pkt_size)) < 0) { av_log(avccontext, AV_LOG_ERROR, "Error getting output packet of size %d.\n", pkt_size); goto error; } memcpy(pkt->data, p_frame_output->p_encbuf, p_frame_output->size); avccontext->coded_frame->key_frame = p_frame_output->key_frame; /* Use the frame number of the encoded frame as the pts. It is OK to * do so since Dirac is a constant frame rate codec. It expects input * to be of constant frame rate. */ pkt->pts = avccontext->coded_frame->pts = p_frame_output->frame_num; pkt->dts = p_schro_params->dts++; enc_size = p_frame_output->size; /* Append the end of sequence information to the last frame in the * sequence. */ if (last_frame_in_sequence && p_schro_params->enc_buf_size > 0) { memcpy(pkt->data + enc_size, p_schro_params->enc_buf, p_schro_params->enc_buf_size); enc_size += p_schro_params->enc_buf_size; av_freep(&p_schro_params->enc_buf); p_schro_params->enc_buf_size = 0; } if (p_frame_output->key_frame) pkt->flags |= AV_PKT_FLAG_KEY; *got_packet = 1; error: /* free frame */ libschroedinger_free_frame(p_frame_output); return ret; }
static int libschroedinger_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; int64_t pts = avpkt->pts; SchroTag *tag; SchroDecoderParams *p_schro_params = avctx->priv_data; SchroDecoder *decoder = p_schro_params->decoder; SchroBuffer *enc_buf; SchroFrame* frame; AVFrame *avframe = data; int state; int go = 1; int outer = 1; SchroParseUnitContext parse_ctx; LibSchroFrameContext *framewithpts = NULL; *got_frame = 0; parse_context_init(&parse_ctx, buf, buf_size); if (!buf_size) { if (!p_schro_params->eos_signalled) { state = schro_decoder_push_end_of_stream(decoder); p_schro_params->eos_signalled = 1; } } /* Loop through all the individual parse units in the input buffer */ do { if ((enc_buf = find_next_parse_unit(&parse_ctx))) { /* Set Schrotag with the pts to be recovered after decoding*/ enc_buf->tag = schro_tag_new(av_malloc(sizeof(int64_t)), av_free); if (!enc_buf->tag->value) { av_log(avctx, AV_LOG_ERROR, "Unable to allocate SchroTag\n"); return AVERROR(ENOMEM); } AV_WN(64, enc_buf->tag->value, pts); /* Push buffer into decoder. */ if (SCHRO_PARSE_CODE_IS_PICTURE(enc_buf->data[4]) && SCHRO_PARSE_CODE_NUM_REFS(enc_buf->data[4]) > 0) avctx->has_b_frames = 1; state = schro_decoder_push(decoder, enc_buf); if (state == SCHRO_DECODER_FIRST_ACCESS_UNIT) libschroedinger_handle_first_access_unit(avctx); go = 1; } else outer = 0; while (go) { /* Parse data and process result. */ state = schro_decoder_wait(decoder); switch (state) { case SCHRO_DECODER_FIRST_ACCESS_UNIT: libschroedinger_handle_first_access_unit(avctx); break; case SCHRO_DECODER_NEED_BITS: /* Need more input data - stop iterating over what we have. */ go = 0; break; case SCHRO_DECODER_NEED_FRAME: /* Decoder needs a frame - create one and push it in. */ frame = ff_create_schro_frame(avctx, p_schro_params->frame_format); if (!frame) return AVERROR(ENOMEM); schro_decoder_add_output_picture(decoder, frame); break; case SCHRO_DECODER_OK: /* Pull a frame out of the decoder. */ tag = schro_decoder_get_picture_tag(decoder); frame = schro_decoder_pull(decoder); if (frame) { /* Add relation between schroframe and pts. */ framewithpts = av_malloc(sizeof(LibSchroFrameContext)); if (!framewithpts) { av_log(avctx, AV_LOG_ERROR, "Unable to allocate FrameWithPts\n"); return AVERROR(ENOMEM); } framewithpts->frame = frame; framewithpts->pts = AV_RN64(tag->value); ff_schro_queue_push_back(&p_schro_params->dec_frame_queue, framewithpts); } break; case SCHRO_DECODER_EOS: go = 0; p_schro_params->eos_pulled = 1; schro_decoder_reset(decoder); outer = 0; break; case SCHRO_DECODER_ERROR: return -1; break; } } } while (outer); /* Grab next frame to be returned from the top of the queue. */ framewithpts = ff_schro_queue_pop(&p_schro_params->dec_frame_queue); if (framewithpts && framewithpts->frame) { int ret; if ((ret = ff_get_buffer(avctx, avframe, 0)) < 0) return ret; memcpy(avframe->data[0], framewithpts->frame->components[0].data, framewithpts->frame->components[0].length); memcpy(avframe->data[1], framewithpts->frame->components[1].data, framewithpts->frame->components[1].length); memcpy(avframe->data[2], framewithpts->frame->components[2].data, framewithpts->frame->components[2].length); /* Fill frame with current buffer data from Schroedinger. */ avframe->pkt_pts = framewithpts->pts; avframe->linesize[0] = framewithpts->frame->components[0].stride; avframe->linesize[1] = framewithpts->frame->components[1].stride; avframe->linesize[2] = framewithpts->frame->components[2].stride; *got_frame = 1; /* Now free the frame resources. */ libschroedinger_decode_frame_free(framewithpts->frame); av_free(framewithpts); } else { data = NULL; *got_frame = 0; } return buf_size; }