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/*
* Ogg Daala parser
* Copyright (C) 2015 Rostislav Pehlivanov <atomnuker gmail com>
* Copyright (C) 2015 Vittorio Giovara <vittorio.giovara gmail com>
*
* 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
*/
#include <stdlib.h>
#include "libavcodec/bytestream.h"
#include "avformat.h"
#include "internal.h"
#include "oggdec.h"
struct DaalaPixFmtMap {
enum AVPixelFormat ffmpeg_fmt;
int depth;
int planes;
int xdec[4];
int ydec[4];
};
/* Currently supported formats only */
static const struct DaalaPixFmtMap list_fmts[] = {
{ AV_PIX_FMT_YUV420P, 8, 3, {0, 1, 1, 0}, {0, 1, 1, 0} },
{ AV_PIX_FMT_YUV444P, 8, 3, {0, 0, 0, 0}, {0, 0, 0, 0} }
};
typedef struct DaalaInfoHeader {
int init_d;
int fpr;
int gpshift;
int gpmask;
int version_maj;
int version_min;
int version_sub;
int frame_duration;
int keyframe_granule_shift;
struct DaalaPixFmtMap format;
} DaalaInfoHeader;
static inline int daala_match_pix_fmt(struct DaalaPixFmtMap *fmt)
{
int i, j;
for (i = 0; i < FF_ARRAY_ELEMS(list_fmts); i++) {
int match = 0;
if (fmt->depth != list_fmts[i].depth)
continue;
if (fmt->planes != list_fmts[i].planes)
continue;
for (j = 0; j < fmt->planes; j++) {
if (fmt->xdec[j] != list_fmts[i].xdec[j])
continue;
if (fmt->ydec[j] != list_fmts[i].ydec[j])
continue;
match++;
}
if (match == fmt->planes)
return list_fmts[i].ffmpeg_fmt;
}
return -1;
}
static int daala_header(AVFormatContext *s, int idx)
{
int i, err;
uint8_t *cdp;
GetByteContext gb;
AVRational timebase;
struct ogg *ogg = s->priv_data;
struct ogg_stream *os = ogg->streams + idx;
AVStream *st = s->streams[idx];
int cds = st->codec->extradata_size + os->psize + 2;
DaalaInfoHeader *hdr = os->private;
if (!(os->buf[os->pstart] & 0x80))
return 0;
if (!hdr) {
hdr = av_mallocz(sizeof(*hdr));
if (!hdr)
return AVERROR(ENOMEM);
os->private = hdr;
}
switch (os->buf[os->pstart]) {
case 0x80:
bytestream2_init(&gb, os->buf + os->pstart, os->psize);
bytestream2_skip(&gb, ff_daala_codec.magicsize);
hdr->version_maj = bytestream2_get_byte(&gb);
hdr->version_min = bytestream2_get_byte(&gb);
hdr->version_sub = bytestream2_get_byte(&gb);
st->codec->width = bytestream2_get_ne32(&gb);
st->codec->height = bytestream2_get_ne32(&gb);
st->sample_aspect_ratio.num = bytestream2_get_ne32(&gb);
st->sample_aspect_ratio.den = bytestream2_get_ne32(&gb);
timebase.num = bytestream2_get_ne32(&gb);
timebase.den = bytestream2_get_ne32(&gb);
if (timebase.num < 0 && timebase.den < 0) {
av_log(s, AV_LOG_WARNING, "Invalid timebase, assuming 30 FPS\n");
timebase.num = 1;
timebase.den = 30;
}
avpriv_set_pts_info(st, 64, timebase.den, timebase.num);
hdr->frame_duration = bytestream2_get_ne32(&gb);
hdr->gpshift = bytestream2_get_byte(&gb);
hdr->gpmask = (1 << hdr->gpshift) - 1;
hdr->format.depth = 8 + 2*(bytestream2_get_byte(&gb)-1);
hdr->fpr = bytestream2_get_byte(&gb);
hdr->format.planes = bytestream2_get_byte(&gb);
for (i = 0; i < hdr->format.planes; i++) {
hdr->format.xdec[i] = bytestream2_get_byte(&gb);
hdr->format.ydec[i] = bytestream2_get_byte(&gb);
}
if ((st->codec->pix_fmt = daala_match_pix_fmt(&hdr->format)) < 0)
av_log(s, AV_LOG_ERROR, "Unsupported pixel format - %i %i\n",
hdr->format.depth, hdr->format.planes);
st->codec->codec_id = AV_CODEC_ID_DAALA;
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->need_parsing = AVSTREAM_PARSE_HEADERS;
hdr->init_d = 1;
break;
case 0x81:
if (!hdr->init_d)
return AVERROR_INVALIDDATA;
ff_vorbis_stream_comment(s, st,
os->buf + os->pstart + ff_daala_codec.magicsize,
os->psize - ff_daala_codec.magicsize);
break;
case 0x82:
if (!hdr->init_d)
return AVERROR_INVALIDDATA;
break;
default:
av_log(s, AV_LOG_ERROR, "Unknown header type %X\n", os->buf[os->pstart]);
return AVERROR_INVALIDDATA;
break;
}
if ((err = av_reallocp(&st->codec->extradata,
cds + AV_INPUT_BUFFER_PADDING_SIZE)) < 0) {
st->codec->extradata_size = 0;
return err;
}
memset(st->codec->extradata + cds, 0, AV_INPUT_BUFFER_PADDING_SIZE);
cdp = st->codec->extradata + st->codec->extradata_size;
*cdp++ = os->psize >> 8;
*cdp++ = os->psize & 0xff;
memcpy(cdp, os->buf + os->pstart, os->psize);
st->codec->extradata_size = cds;
return 1;
}
static uint64_t daala_gptopts(AVFormatContext *ctx, int idx, uint64_t gp,
int64_t *dts)
{
uint64_t iframe, pframe;
struct ogg *ogg = ctx->priv_data;
struct ogg_stream *os = ogg->streams + idx;
DaalaInfoHeader *hdr = os->private;
if (!hdr)
return AV_NOPTS_VALUE;
iframe = gp >> hdr->gpshift;
pframe = gp & hdr->gpmask;
if (!pframe)
os->pflags |= AV_PKT_FLAG_KEY;
if (dts)
*dts = iframe + pframe;
return iframe + pframe;
}
static int daala_packet(AVFormatContext *s, int idx)
{
int seg, duration = 1;
struct ogg *ogg = s->priv_data;
struct ogg_stream *os = ogg->streams + idx;
/*
* first packet handling: here we parse the duration of each packet in the
* first page and compare the total duration to the page granule to find the
* encoder delay and set the first timestamp
*/
if ((!os->lastpts || os->lastpts == AV_NOPTS_VALUE) && !(os->flags & OGG_FLAG_EOS)) {
for (seg = os->segp; seg < os->nsegs; seg++)
if (os->segments[seg] < 255)
duration++;
os->lastpts = os->lastdts = daala_gptopts(s, idx, os->granule, NULL) - duration;
if(s->streams[idx]->start_time == AV_NOPTS_VALUE) {
s->streams[idx]->start_time = os->lastpts;
if (s->streams[idx]->duration)
s->streams[idx]->duration -= s->streams[idx]->start_time;
}
}
/* parse packet duration */
if (os->psize > 0)
os->pduration = 1;
return 0;
}
const struct ogg_codec ff_daala_codec = {
.name = "Daala",
.magic = "\200daala",
.magicsize = 6,
.header = daala_header,
.packet = daala_packet,
.gptopts = daala_gptopts,
.granule_is_start = 1,
.nb_header = 3,
};
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