#include <assert.h>
#include "libavutil/imgutils.h"
#include "libavutil/avassert.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "dsputil.h"
#include "mjpeg.h"
#include "mjpegdec.h"
#include "jpeglsdec.h"
Go to the source code of this file.
Defines | |
#define | REFINE_BIT(j) |
#define | ZERO_RUN |
#define | OFFSET(x) offsetof(MJpegDecodeContext, x) |
#define | VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM |
Functions | |
static int | build_vlc (VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table, int nb_codes, int use_static, int is_ac) |
static void | build_basic_mjpeg_vlc (MJpegDecodeContext *s) |
av_cold int | ff_mjpeg_decode_init (AVCodecContext *avctx) |
int | ff_mjpeg_decode_dqt (MJpegDecodeContext *s) |
int | ff_mjpeg_decode_dht (MJpegDecodeContext *s) |
int | ff_mjpeg_decode_sof (MJpegDecodeContext *s) |
static int | mjpeg_decode_dc (MJpegDecodeContext *s, int dc_index) |
static int | decode_block (MJpegDecodeContext *s, DCTELEM *block, int component, int dc_index, int ac_index, int16_t *quant_matrix) |
static int | decode_dc_progressive (MJpegDecodeContext *s, DCTELEM *block, int component, int dc_index, int16_t *quant_matrix, int Al) |
static int | decode_block_progressive (MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz, int ac_index, int16_t *quant_matrix, int ss, int se, int Al, int *EOBRUN) |
static int | decode_block_refinement (MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz, int ac_index, int16_t *quant_matrix, int ss, int se, int Al, int *EOBRUN) |
static int | ljpeg_decode_rgb_scan (MJpegDecodeContext *s, int nb_components, int predictor, int point_transform) |
static int | ljpeg_decode_yuv_scan (MJpegDecodeContext *s, int predictor, int point_transform) |
static av_always_inline void | mjpeg_copy_block (uint8_t *dst, const uint8_t *src, int linesize, int lowres) |
static int | mjpeg_decode_scan (MJpegDecodeContext *s, int nb_components, int Ah, int Al, const uint8_t *mb_bitmask, const AVFrame *reference) |
static int | mjpeg_decode_scan_progressive_ac (MJpegDecodeContext *s, int ss, int se, int Ah, int Al) |
int | ff_mjpeg_decode_sos (MJpegDecodeContext *s, const uint8_t *mb_bitmask, const AVFrame *reference) |
static int | mjpeg_decode_dri (MJpegDecodeContext *s) |
static int | mjpeg_decode_app (MJpegDecodeContext *s) |
static int | mjpeg_decode_com (MJpegDecodeContext *s) |
static int | find_marker (const uint8_t **pbuf_ptr, const uint8_t *buf_end) |
int | ff_mjpeg_find_marker (MJpegDecodeContext *s, const uint8_t **buf_ptr, const uint8_t *buf_end, const uint8_t **unescaped_buf_ptr, int *unescaped_buf_size) |
int | ff_mjpeg_decode_frame (AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt) |
av_cold int | ff_mjpeg_decode_end (AVCodecContext *avctx) |
Variables | |
static const AVOption | options [] |
static const AVClass | mjpegdec_class |
AVCodec | ff_mjpeg_decoder |
AVCodec | ff_thp_decoder |
Definition in file mjpegdec.c.
#define OFFSET | ( | x | ) | offsetof(MJpegDecodeContext, x) |
Definition at line 1656 of file mjpegdec.c.
#define REFINE_BIT | ( | j | ) |
Value:
{\ UPDATE_CACHE(re, &s->gb);\ sign = block[j]>>15;\ block[j] += SHOW_UBITS(re, &s->gb, 1) * ((quant_matrix[j]^sign)-sign) << Al;\ LAST_SKIP_BITS(re, &s->gb, 1);\ }
Definition at line 562 of file mjpegdec.c.
Referenced by decode_block_refinement().
#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM |
Definition at line 1657 of file mjpegdec.c.
#define ZERO_RUN |
Value:
for(;;i++) {\ if(i > last) {\ i += run;\ if(i > se) {\ av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);\ return -1;\ }\ break;\ }\ j = s->scantable.permutated[i];\ if(block[j])\ REFINE_BIT(j)\ else if(run-- == 0)\ break;\ }
Definition at line 569 of file mjpegdec.c.
Referenced by decode_block_refinement().
static void build_basic_mjpeg_vlc | ( | MJpegDecodeContext * | s | ) | [static] |
static int build_vlc | ( | VLC * | vlc, | |
const uint8_t * | bits_table, | |||
const uint8_t * | val_table, | |||
int | nb_codes, | |||
int | use_static, | |||
int | is_ac | |||
) | [static] |
Definition at line 46 of file mjpegdec.c.
Referenced by build_basic_mjpeg_vlc(), and ff_mjpeg_decode_dht().
static int decode_block | ( | MJpegDecodeContext * | s, | |
DCTELEM * | block, | |||
int | component, | |||
int | dc_index, | |||
int | ac_index, | |||
int16_t * | quant_matrix | |||
) | [static] |
Definition at line 431 of file mjpegdec.c.
static int decode_block_progressive | ( | MJpegDecodeContext * | s, | |
DCTELEM * | block, | |||
uint8_t * | last_nnz, | |||
int | ac_index, | |||
int16_t * | quant_matrix, | |||
int | ss, | |||
int | se, | |||
int | Al, | |||
int * | EOBRUN | |||
) | [static] |
static int decode_block_refinement | ( | MJpegDecodeContext * | s, | |
DCTELEM * | block, | |||
uint8_t * | last_nnz, | |||
int | ac_index, | |||
int16_t * | quant_matrix, | |||
int | ss, | |||
int | se, | |||
int | Al, | |||
int * | EOBRUN | |||
) | [static] |
static int decode_dc_progressive | ( | MJpegDecodeContext * | s, | |
DCTELEM * | block, | |||
int | component, | |||
int | dc_index, | |||
int16_t * | quant_matrix, | |||
int | Al | |||
) | [static] |
int ff_mjpeg_decode_dht | ( | MJpegDecodeContext * | s | ) |
Definition at line 165 of file mjpegdec.c.
Referenced by ff_mjpeg_decode_frame(), ff_mjpeg_decode_init(), mjpegb_decode_frame(), and mxpeg_decode_frame().
int ff_mjpeg_decode_dqt | ( | MJpegDecodeContext * | s | ) |
Definition at line 130 of file mjpegdec.c.
Referenced by ff_mjpeg_decode_frame(), mjpegb_decode_frame(), and mxpeg_decode_frame().
av_cold int ff_mjpeg_decode_end | ( | AVCodecContext * | avctx | ) |
int ff_mjpeg_decode_frame | ( | AVCodecContext * | avctx, | |
void * | data, | |||
int * | data_size, | |||
AVPacket * | avpkt | |||
) |
av_cold int ff_mjpeg_decode_init | ( | AVCodecContext * | avctx | ) |
int ff_mjpeg_decode_sof | ( | MJpegDecodeContext * | s | ) |
Definition at line 218 of file mjpegdec.c.
Referenced by ff_mjpeg_decode_frame(), mjpegb_decode_frame(), and mxpeg_decode_frame().
int ff_mjpeg_decode_sos | ( | MJpegDecodeContext * | s, | |
const uint8_t * | mb_bitmask, | |||
const AVFrame * | reference | |||
) |
Definition at line 1020 of file mjpegdec.c.
Referenced by ff_mjpeg_decode_frame(), mjpegb_decode_frame(), and mxpeg_decode_frame().
int ff_mjpeg_find_marker | ( | MJpegDecodeContext * | s, | |
const uint8_t ** | buf_ptr, | |||
const uint8_t * | buf_end, | |||
const uint8_t ** | unescaped_buf_ptr, | |||
int * | unescaped_buf_size | |||
) |
Definition at line 1368 of file mjpegdec.c.
Referenced by ff_mjpeg_decode_frame(), and mxpeg_decode_frame().
static int find_marker | ( | const uint8_t ** | pbuf_ptr, | |
const uint8_t * | buf_end | |||
) | [static] |
static int ljpeg_decode_rgb_scan | ( | MJpegDecodeContext * | s, | |
int | nb_components, | |||
int | predictor, | |||
int | point_transform | |||
) | [static] |
static int ljpeg_decode_yuv_scan | ( | MJpegDecodeContext * | s, | |
int | predictor, | |||
int | point_transform | |||
) | [static] |
static av_always_inline void mjpeg_copy_block | ( | uint8_t * | dst, | |
const uint8_t * | src, | |||
int | linesize, | |||
int | lowres | |||
) | [static] |
static int mjpeg_decode_app | ( | MJpegDecodeContext * | s | ) | [static] |
static int mjpeg_decode_com | ( | MJpegDecodeContext * | s | ) | [static] |
static int mjpeg_decode_dc | ( | MJpegDecodeContext * | s, | |
int | dc_index | |||
) | [inline, static] |
Definition at line 413 of file mjpegdec.c.
Referenced by decode_block(), decode_dc_progressive(), ljpeg_decode_rgb_scan(), and ljpeg_decode_yuv_scan().
static int mjpeg_decode_dri | ( | MJpegDecodeContext * | s | ) | [static] |
static int mjpeg_decode_scan | ( | MJpegDecodeContext * | s, | |
int | nb_components, | |||
int | Ah, | |||
int | Al, | |||
const uint8_t * | mb_bitmask, | |||
const AVFrame * | reference | |||
) | [static] |
static int mjpeg_decode_scan_progressive_ac | ( | MJpegDecodeContext * | s, | |
int | ss, | |||
int | se, | |||
int | Ah, | |||
int | Al | |||
) | [static] |
Initial value:
{ .name = "mjpeg", .type = AVMEDIA_TYPE_VIDEO, .id = CODEC_ID_MJPEG, .priv_data_size = sizeof(MJpegDecodeContext), .init = ff_mjpeg_decode_init, .close = ff_mjpeg_decode_end, .decode = ff_mjpeg_decode_frame, .capabilities = CODEC_CAP_DR1, .max_lowres = 3, .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"), .priv_class = &mjpegdec_class, }
Definition at line 1670 of file mjpegdec.c.
Initial value:
{ .name = "thp", .type = AVMEDIA_TYPE_VIDEO, .id = CODEC_ID_THP, .priv_data_size = sizeof(MJpegDecodeContext), .init = ff_mjpeg_decode_init, .close = ff_mjpeg_decode_end, .decode = ff_mjpeg_decode_frame, .capabilities = CODEC_CAP_DR1, .max_lowres = 3, .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"), }
Definition at line 1684 of file mjpegdec.c.
const AVClass mjpegdec_class [static] |
Initial value:
{ .class_name = "MJPEG decoder", .item_name = av_default_item_name, .option = options, .version = LIBAVUTIL_VERSION_INT, }
Definition at line 1663 of file mjpegdec.c.
Initial value:
{ { "extern_huff", "Use external huffman table.", OFFSET(extern_huff), AV_OPT_TYPE_INT, { 0 }, 0, 1, VD }, { NULL }, }
Definition at line 1658 of file mjpegdec.c.