diff options
| author | Tim Redfern <tim@eclectronics.org> | 2013-09-05 17:55:35 +0100 |
|---|---|---|
| committer | Tim Redfern <tim@eclectronics.org> | 2013-09-05 17:55:35 +0100 |
| commit | 741fb4b9e135cfb161a749db88713229038577bb (patch) | |
| tree | 08bc9925659cbcac45162bacf31dc6336d4f60b4 /ffmpeg1/libavcodec/mjpeg2jpeg_bsf.c | |
| parent | a2e1bf3495b7bfefdaedb8fc737e969ab06df079 (diff) | |
making act segmenter
Diffstat (limited to 'ffmpeg1/libavcodec/mjpeg2jpeg_bsf.c')
| -rw-r--r-- | ffmpeg1/libavcodec/mjpeg2jpeg_bsf.c | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/ffmpeg1/libavcodec/mjpeg2jpeg_bsf.c b/ffmpeg1/libavcodec/mjpeg2jpeg_bsf.c deleted file mode 100644 index f367288..0000000 --- a/ffmpeg1/libavcodec/mjpeg2jpeg_bsf.c +++ /dev/null @@ -1,112 +0,0 @@ -/* - * MJPEG/AVI1 to JPEG/JFIF bitstream format filter - * Copyright (c) 2010 Adrian Daerr and Nicolas George - * - * This file is part of FFmpeg. - * - * FFmpeg 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, - * 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 - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/* - * Adapted from mjpeg2jpeg.c, with original copyright: - * Paris 2010 Adrian Daerr, public domain - */ - -#include <string.h> -#include "avcodec.h" -#include "mjpeg.h" - -static const uint8_t jpeg_header[] = { - 0xff, 0xd8, // SOI - 0xff, 0xe0, // APP0 - 0x00, 0x10, // APP0 header size (including - // this field, but excluding preceding) - 0x4a, 0x46, 0x49, 0x46, 0x00, // ID string 'JFIF\0' - 0x01, 0x01, // version - 0x00, // bits per type - 0x00, 0x00, // X density - 0x00, 0x00, // Y density - 0x00, // X thumbnail size - 0x00, // Y thumbnail size -}; - -static const int dht_segment_size = 420; -static const uint8_t dht_segment_head[] = { 0xFF, 0xC4, 0x01, 0xA2, 0x00 }; -static const uint8_t dht_segment_frag[] = { - 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, - 0x0a, 0x0b, 0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, - 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, -}; - -static uint8_t *append(uint8_t *buf, const uint8_t *src, int size) -{ - memcpy(buf, src, size); - return buf + size; -} - -static uint8_t *append_dht_segment(uint8_t *buf) -{ - buf = append(buf, dht_segment_head, sizeof(dht_segment_head)); - buf = append(buf, avpriv_mjpeg_bits_dc_luminance + 1, 16); - buf = append(buf, dht_segment_frag, sizeof(dht_segment_frag)); - buf = append(buf, avpriv_mjpeg_val_dc, 12); - *(buf++) = 0x10; - buf = append(buf, avpriv_mjpeg_bits_ac_luminance + 1, 16); - buf = append(buf, avpriv_mjpeg_val_ac_luminance, 162); - *(buf++) = 0x11; - buf = append(buf, avpriv_mjpeg_bits_ac_chrominance + 1, 16); - buf = append(buf, avpriv_mjpeg_val_ac_chrominance, 162); - return buf; -} - -static int mjpeg2jpeg_filter(AVBitStreamFilterContext *bsfc, - AVCodecContext *avctx, const char *args, - uint8_t **poutbuf, int *poutbuf_size, - const uint8_t *buf, int buf_size, - int keyframe) -{ - int input_skip, output_size; - uint8_t *output, *out; - - if (buf_size < 12) { - av_log(avctx, AV_LOG_ERROR, "input is truncated\n"); - return AVERROR_INVALIDDATA; - } - if (memcmp("AVI1", buf + 6, 4)) { - av_log(avctx, AV_LOG_ERROR, "input is not MJPEG/AVI1\n"); - return AVERROR_INVALIDDATA; - } - input_skip = (buf[4] << 8) + buf[5] + 4; - if (buf_size < input_skip) { - av_log(avctx, AV_LOG_ERROR, "input is truncated\n"); - return AVERROR_INVALIDDATA; - } - output_size = buf_size - input_skip + - sizeof(jpeg_header) + dht_segment_size; - output = out = av_malloc(output_size); - if (!output) - return AVERROR(ENOMEM); - out = append(out, jpeg_header, sizeof(jpeg_header)); - out = append_dht_segment(out); - out = append(out, buf + input_skip, buf_size - input_skip); - *poutbuf = output; - *poutbuf_size = output_size; - return 1; -} - -AVBitStreamFilter ff_mjpeg2jpeg_bsf = { - .name = "mjpeg2jpeg", - .filter = mjpeg2jpeg_filter, -}; |
