static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt); RawVideoContext *context = avctx->priv_data; const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; int need_copy = !avpkt->buf || context->is_2_4_bpp || context->is_yuv2; int res; AVFrame *frame = data; AVPicture *picture = data; frame->pict_type = AV_PICTURE_TYPE_I; frame->key_frame = 1; frame->reordered_opaque = avctx->reordered_opaque; frame->pkt_pts = avctx->internal->pkt->pts; if (buf_size < context->frame_size - (avctx->pix_fmt == AV_PIX_FMT_PAL8 ? AVPALETTE_SIZE : 0)) return -1; if (need_copy) frame->buf[0] = av_buffer_alloc(context->frame_size); else frame->buf[0] = av_buffer_ref(avpkt->buf); if (!frame->buf[0]) return AVERROR(ENOMEM); //2bpp and 4bpp raw in avi and mov (yes this is ugly ...) if (context->is_2_4_bpp) { int i; uint8_t *dst = frame->buf[0]->data; buf_size = context->frame_size - AVPALETTE_SIZE; if (avctx->bits_per_coded_sample == 4) { for (i = 0; 2 * i + 1 < buf_size; i++) { dst[2 * i + 0] = buf[i] >> 4; dst[2 * i + 1] = buf[i] & 15; } } else { for (i = 0; 4 * i + 3 < buf_size; i++) { dst[4 * i + 0] = buf[i] >> 6; dst[4 * i + 1] = buf[i] >> 4 & 3; dst[4 * i + 2] = buf[i] >> 2 & 3; dst[4 * i + 3] = buf[i] & 3; } } buf = dst; } else if (need_copy) { memcpy(frame->buf[0]->data, buf, FFMIN(buf_size, context->frame_size)); buf = frame->buf[0]->data; } if (avctx->codec_tag == MKTAG('A', 'V', '1', 'x') || avctx->codec_tag == MKTAG('A', 'V', 'u', 'p')) buf += buf_size - context->frame_size; if ((res = avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height)) < 0) return res; if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL); if (pal) { av_buffer_unref(&context->palette); context->palette = av_buffer_alloc(AVPALETTE_SIZE); if (!context->palette) return AVERROR(ENOMEM); memcpy(context->palette->data, pal, AVPALETTE_SIZE); frame->palette_has_changed = 1; } } if ((avctx->pix_fmt == AV_PIX_FMT_PAL8 && buf_size < context->frame_size) || (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)) { frame->buf[1] = av_buffer_ref(context->palette); if (!frame->buf[1]) return AVERROR(ENOMEM); frame->data[1] = frame->buf[1]->data; } if (avctx->pix_fmt == AV_PIX_FMT_BGR24 && ((frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size) frame->linesize[0] = (frame->linesize[0] + 3) & ~3; if (context->flip) flip(avctx, picture); if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2') || avctx->codec_tag == MKTAG('Y', 'V', '1', '6') || avctx->codec_tag == MKTAG('Y', 'V', '2', '4') || avctx->codec_tag == MKTAG('Y', 'V', 'U', '9')) FFSWAP(uint8_t *, picture->data[1], picture->data[2]); if (avctx->codec_tag == AV_RL32("yuv2") && avctx->pix_fmt == AV_PIX_FMT_YUYV422) { int x, y; uint8_t *line = picture->data[0]; for (y = 0; y < avctx->height; y++) { for (x = 0; x < avctx->width; x++) line[2 * x + 1] ^= 0x80; line += picture->linesize[0]; } } *got_frame = 1; return buf_size; }