static int aasc_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; AascContext *s = avctx->priv_data; int compr, i, stride, ret; s->frame.reference = 1; s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE; if ((ret = avctx->reget_buffer(avctx, &s->frame)) < 0) { av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); return ret; } compr = AV_RL32(buf); buf += 4; buf_size -= 4; switch (compr) { case 0: stride = (avctx->width * 3 + 3) & ~3; for (i = avctx->height - 1; i >= 0; i--) { memcpy(s->frame.data[0] + i * s->frame.linesize[0], buf, avctx->width * 3); buf += stride; } break; case 1: bytestream2_init(&s->gb, buf - 4, buf_size + 4); ff_msrle_decode(avctx, (AVPicture*)&s->frame, 8, &s->gb); break; default: av_log(avctx, AV_LOG_ERROR, "Unknown compression type %d\n", compr); return AVERROR_INVALIDDATA; } *got_frame = 1; *(AVFrame*)data = s->frame; /* report that the buffer was completely consumed */ return buf_size; }
static int aasc_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; AascContext *s = avctx->priv_data; int compr, i, stride, ret; s->frame.reference = 1; s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE; if ((ret = avctx->reget_buffer(avctx, &s->frame)) < 0) { av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); return ret; } compr = AV_RL32(buf); buf += 4; buf_size -= 4; switch (compr) { case 0: stride = (avctx->width * 3 + 3) & ~3; for (i = avctx->height - 1; i >= 0; i--) { memcpy(s->frame.data[0] + i * s->frame.linesize[0], buf, avctx->width * 3); buf += stride; } break; case 1: bytestream2_init(&s->gb, buf - 4, buf_size + 4); ff_msrle_decode(avctx, (AVPicture*)&s->frame, 8, &s->gb); break; default: av_log(avctx, AV_LOG_ERROR, "Unknown compression type %d\n", compr); return AVERROR_INVALIDDATA; } *got_frame = 1; *(AVFrame*)data = s->frame;   return buf_size; }