* Sunplus JPEG decoder (SP5X)
* Copyright (c) 2003 Alex Beregszaszi
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file sp5xdec.c
+ * @file
* Sunplus JPEG decoder (SP5X).
*/
static int sp5x_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- const uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
-#if 0
- MJpegDecodeContext *s = avctx->priv_data;
-#endif
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ AVPacket avpkt_recoded;
const int qscale = 5;
- const uint8_t *buf_ptr, *buf_end;
uint8_t *recoded;
int i = 0, j = 0;
if (!avctx->width || !avctx->height)
return -1;
- buf_ptr = buf;
- buf_end = buf + buf_size;
-
-#if 1
recoded = av_mallocz(buf_size + 1024);
if (!recoded)
return -1;
recoded[j++] = 0xFF;
recoded[j++] = 0xD9;
- avctx->flags &= ~CODEC_FLAG_EMU_EDGE;
- i = ff_mjpeg_decode_frame(avctx, data, data_size, recoded, j);
+ av_init_packet(&avpkt_recoded);
+ avpkt_recoded.data = recoded;
+ avpkt_recoded.size = j;
+ i = ff_mjpeg_decode_frame(avctx, data, data_size, &avpkt_recoded);
av_free(recoded);
-#else
- /* SOF */
- s->bits = 8;
- s->width = avctx->coded_width;
- s->height = avctx->coded_height;
- s->nb_components = 3;
- s->component_id[0] = 0;
- s->h_count[0] = 2;
- s->v_count[0] = 2;
- s->quant_index[0] = 0;
- s->component_id[1] = 1;
- s->h_count[1] = 1;
- s->v_count[1] = 1;
- s->quant_index[1] = 1;
- s->component_id[2] = 2;
- s->h_count[2] = 1;
- s->v_count[2] = 1;
- s->quant_index[2] = 1;
- s->h_max = 2;
- s->v_max = 2;
-
- s->qscale_table = av_mallocz((s->width+15)/16);
- avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420;
- s->interlaced = 0;
-
- s->picture.reference = 0;
- if (avctx->get_buffer(avctx, &s->picture) < 0)
- {
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
- }
-
- s->picture.pict_type = FF_I_TYPE;
- s->picture.key_frame = 1;
-
- for (i = 0; i < 3; i++)
- s->linesize[i] = s->picture.linesize[i] << s->interlaced;
-
- /* DQT */
- for (i = 0; i < 64; i++)
- {
- j = s->scantable.permutated[i];
- s->quant_matrixes[0][j] = sp5x_quant_table[(qscale * 2) + i];
- }
- s->qscale[0] = FFMAX(
- s->quant_matrixes[0][s->scantable.permutated[1]],
- s->quant_matrixes[0][s->scantable.permutated[8]]) >> 1;
-
- for (i = 0; i < 64; i++)
- {
- j = s->scantable.permutated[i];
- s->quant_matrixes[1][j] = sp5x_quant_table[(qscale * 2) + 1 + i];
- }
- s->qscale[1] = FFMAX(
- s->quant_matrixes[1][s->scantable.permutated[1]],
- s->quant_matrixes[1][s->scantable.permutated[8]]) >> 1;
-
- /* DHT */
-
- /* SOS */
- s->comp_index[0] = 0;
- s->nb_blocks[0] = s->h_count[0] * s->v_count[0];
- s->h_scount[0] = s->h_count[0];
- s->v_scount[0] = s->v_count[0];
- s->dc_index[0] = 0;
- s->ac_index[0] = 0;
-
- s->comp_index[1] = 1;
- s->nb_blocks[1] = s->h_count[1] * s->v_count[1];
- s->h_scount[1] = s->h_count[1];
- s->v_scount[1] = s->v_count[1];
- s->dc_index[1] = 1;
- s->ac_index[1] = 1;
-
- s->comp_index[2] = 2;
- s->nb_blocks[2] = s->h_count[2] * s->v_count[2];
- s->h_scount[2] = s->h_count[2];
- s->v_scount[2] = s->v_count[2];
- s->dc_index[2] = 1;
- s->ac_index[2] = 1;
-
- for (i = 0; i < 3; i++)
- s->last_dc[i] = 1024;
-
- s->mb_width = (s->width * s->h_max * 8 -1) / (s->h_max * 8);
- s->mb_height = (s->height * s->v_max * 8 -1) / (s->v_max * 8);
-
- init_get_bits(&s->gb, buf+14, (buf_size-14)*8);
-
- return mjpeg_decode_scan(s);
-#endif
-
return i;
}
-AVCodec sp5x_decoder = {
- "sp5x",
- CODEC_TYPE_VIDEO,
- CODEC_ID_SP5X,
- sizeof(MJpegDecodeContext),
- ff_mjpeg_decode_init,
- NULL,
- ff_mjpeg_decode_end,
- sp5x_decode_frame,
- CODEC_CAP_DR1,
- NULL,
- .long_name = NULL_IF_CONFIG_SMALL("Sunplus JPEG (SP5X)"),
+AVCodec ff_sp5x_decoder = {
+ .name = "sp5x",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_SP5X,
+ .priv_data_size = sizeof(MJpegDecodeContext),
+ .init = ff_mjpeg_decode_init,
+ .close = ff_mjpeg_decode_end,
+ .decode = sp5x_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Sunplus JPEG (SP5X)"),
};
-AVCodec amv_decoder = {
- "amv",
- CODEC_TYPE_VIDEO,
- CODEC_ID_AMV,
- sizeof(MJpegDecodeContext),
- ff_mjpeg_decode_init,
- NULL,
- ff_mjpeg_decode_end,
- sp5x_decode_frame,
- .long_name = NULL_IF_CONFIG_SMALL("AMV Video"),
+AVCodec ff_amv_decoder = {
+ .name = "amv",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_AMV,
+ .priv_data_size = sizeof(MJpegDecodeContext),
+ .init = ff_mjpeg_decode_init,
+ .close = ff_mjpeg_decode_end,
+ .decode = sp5x_decode_frame,
+ .long_name = NULL_IF_CONFIG_SMALL("AMV Video"),
};
projects / ffmpeg / blobdiff