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FOURCC removed, using ff_get_fourcc instead (should be big-endian safe), workarounded a restart interval bug (Spectralfan.mov) (rst support should be rewritten and moved from decode_sos)
Originally committed as revision 1094 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Alex Beregszaszi
parent
64c133898a
commit
f3a3444721
@ -578,9 +578,6 @@ void mjpeg_encode_mb(MpegEncContext *s,
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/******************************************/
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/* decoding */
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/* compressed picture size */
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#define PICTURE_BUFFER_SIZE 100000
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#define MAX_COMPONENTS 4
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typedef struct MJpegDecodeContext {
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@ -615,7 +612,7 @@ typedef struct MJpegDecodeContext {
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int buggy_avid;
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int restart_interval;
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int restart_count;
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int interleaved_rows;
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int interlace_polarity;
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ScanTable scantable;
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void (*idct_put)(UINT8 *dest/*align 8*/, int line_size, DCTELEM *block/*align 16*/);
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} MJpegDecodeContext;
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@ -655,8 +652,8 @@ static int mjpeg_decode_init(AVCodecContext *avctx)
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MPV_common_end(&s2);
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s->mpeg_enc_ctx_allocated = 0;
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s->buffer_size = PICTURE_BUFFER_SIZE - 1; /* minus 1 to take into
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account FF 00 case */
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s->buffer_size = 102400; /* smaller buffer should be enough,
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but photojpg files could ahive bigger sizes */
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s->buffer = av_malloc(s->buffer_size);
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s->start_code = -1;
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s->first_picture = 1;
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@ -802,6 +799,7 @@ static int mjpeg_decode_sof0(MJpegDecodeContext *s)
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s->org_height != 0 &&
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s->height < ((s->org_height * 3) / 4)) {
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s->interlaced = 1;
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// s->bottom_field = (s->interlace_polarity) ? 1 : 0;
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s->bottom_field = 0;
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}
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@ -1034,7 +1032,7 @@ static int mjpeg_decode_sos(MJpegDecodeContext *s)
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}
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}
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}
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if (s->restart_interval && !--s->restart_count) {
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if ((s->restart_interval <= 8) && !--s->restart_count) {
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align_get_bits(&s->gb);
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skip_bits(&s->gb, 16); /* skip RSTn */
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for (j=0; j<nb_components; j++) /* reset dc */
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@ -1061,8 +1059,7 @@ static int mjpeg_decode_dri(MJpegDecodeContext *s)
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return 0;
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}
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#define FOURCC(a,b,c,d) ((a << 24) | (b << 16) | (c << 8) | d)
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static int mjpeg_decode_app(MJpegDecodeContext *s, int start_code)
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static int mjpeg_decode_app(MJpegDecodeContext *s)
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{
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int len, id;
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@ -1071,13 +1068,13 @@ static int mjpeg_decode_app(MJpegDecodeContext *s, int start_code)
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if (len < 5)
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return -1;
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id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
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id = be2me_32((get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16));
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len -= 6;
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/* buggy AVID, it puts EOI only at every 10th frame */
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/* also this fourcc is used by non-avid files too, it means
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interleaving, but it's always present in AVID files */
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if (id == FOURCC('A','V','I','1'))
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if (id == ff_get_fourcc("AVI1"))
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{
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/* structure:
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4bytes AVI1
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@ -1087,23 +1084,23 @@ static int mjpeg_decode_app(MJpegDecodeContext *s, int start_code)
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4bytes field_size_less_padding
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*/
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s->buggy_avid = 1;
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if (s->first_picture)
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printf("mjpeg: workarounding buggy AVID\n");
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s->interleaved_rows = get_bits(&s->gb, 8);
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// if (s->first_picture)
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// printf("mjpeg: workarounding buggy AVID\n");
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s->interlace_polarity = get_bits(&s->gb, 8);
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#if 0
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skip_bits(&s->gb, 8);
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skip_bits(&s->gb, 32);
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skip_bits(&s->gb, 32);
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len -= 10;
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#endif
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if (s->interleaved_rows)
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printf("mjpeg: interleaved rows: %d\n", s->interleaved_rows);
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// if (s->interlace_polarity)
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// printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
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goto out;
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}
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len -= 2;
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if (id == FOURCC('J','F','I','F'))
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if (id == ff_get_fourcc("JFIF"))
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{
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skip_bits(&s->gb, 8); /* the trailing zero-byte */
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printf("mjpeg: JFIF header found (version: %x.%x)\n",
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@ -1125,11 +1122,11 @@ static int mjpeg_decode_app(MJpegDecodeContext *s, int start_code)
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}
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/* Apple MJPEG-A */
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if ((start_code == APP1) && (len > (0x28 - 8)))
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if ((s->start_code == APP1) && (len > (0x28 - 8)))
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{
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id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
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id = be2me_32((get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16));
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len -= 4;
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if (id == FOURCC('m','j','p','g')) /* Apple MJPEG-A */
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if (id == ff_get_fourcc("mjpg")) /* Apple MJPEG-A */
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{
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#if 0
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skip_bits(&s->gb, 32); /* field size */
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@ -1147,11 +1144,8 @@ static int mjpeg_decode_app(MJpegDecodeContext *s, int start_code)
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}
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out:
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/* should check for further values.. */
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return 0;
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}
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#undef FOURCC
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static int mjpeg_decode_com(MJpegDecodeContext *s)
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{
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@ -1271,6 +1265,8 @@ static int mjpeg_decode_frame(AVCodecContext *avctx,
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av_free(s->buffer);
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s->buffer_size = buf_end-buf_ptr;
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s->buffer = av_malloc(s->buffer_size);
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dprintf("buffer too small, expanding to %d bytes\n",
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s->buffer_size);
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}
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/* unescape buffer of SOS */
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@ -1306,7 +1302,7 @@ static int mjpeg_decode_frame(AVCodecContext *avctx,
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} else if (s->first_picture) {
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/* APP fields */
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if (start_code >= 0xe0 && start_code <= 0xef)
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mjpeg_decode_app(s, start_code);
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mjpeg_decode_app(s);
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/* Comment */
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else if (start_code == COM)
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mjpeg_decode_com(s);
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