static int cllc_decode_frame(AVCodecContext *avctx, void *data, int *got_picture_ptr, AVPacket *avpkt) { CLLCContext *ctx = avctx->priv_data; AVFrame *pic = data; ThreadFrame frame = { .f = data }; uint8_t *src = avpkt->data; uint32_t info_tag, info_offset; int data_size; GetBitContext gb; int coding_type, ret; if (avpkt->size < 4 + 4) { av_log(avctx, AV_LOG_ERROR, "Frame is too small %d.\n", avpkt->size); } info_offset = 0; info_tag = AV_RL32(src); if (info_tag == MKTAG('I', 'N', 'F', 'O')) { info_offset = AV_RL32(src + 4); if (info_offset > UINT32_MAX - 8 || info_offset + 8 > avpkt->size) { av_log(avctx, AV_LOG_ERROR, "Invalid INFO header offset: 0x%08"PRIX32" is too large.\n", info_offset); } ff_canopus_parse_info_tag(avctx, src + 8, info_offset); info_offset += 8; src += info_offset; } data_size = (avpkt->size - info_offset) & ~1; /* Make sure our bswap16'd buffer is big enough */ av_fast_padded_malloc(&ctx->swapped_buf, &ctx->swapped_buf_size, data_size); if (!ctx->swapped_buf) { av_log(avctx, AV_LOG_ERROR, "Could not allocate swapped buffer.\n"); return AVERROR(ENOMEM); } /* bswap16 the buffer since CLLC's bitreader works in 16-bit words */ ctx->bdsp.bswap16_buf((uint16_t *) ctx->swapped_buf, (uint16_t *) src, data_size / 2); if ((ret = init_get_bits8(&gb, ctx->swapped_buf, data_size)) < 0) return ret; /* * Read in coding type. The types are as follows: * * 0 - YUY2 * 1 - BGR24 (Triples) * 2 - BGR24 (Quads) * 3 - BGRA */ coding_type = (AV_RL32(src) >> 8) & 0xFF; av_log(avctx, AV_LOG_DEBUG, "Frame coding type: %d\n", coding_type); switch (coding_type) { case 0: avctx->pix_fmt = AV_PIX_FMT_YUV422P; avctx->bits_per_raw_sample = 8; if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) return ret; ret = decode_yuv_frame(ctx, &gb, pic); if (ret < 0) return ret; break; case 1: case 2: avctx->pix_fmt = AV_PIX_FMT_RGB24; avctx->bits_per_raw_sample = 8; if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) return ret; ret = decode_rgb24_frame(ctx, &gb, pic); if (ret < 0) return ret; break; case 3: avctx->pix_fmt = AV_PIX_FMT_ARGB; avctx->bits_per_raw_sample = 8; if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) return ret; ret = decode_argb_frame(ctx, &gb, pic); if (ret < 0) return ret; break; default: av_log(avctx, AV_LOG_ERROR, "Unknown coding type: %d.\n", coding_type); } pic->key_frame = 1; pic->pict_type = AV_PICTURE_TYPE_I; *got_picture_ptr = 1; return avpkt->size; }