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/*
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* Ogg Daala parser
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* Copyright (C) 2015 Rostislav Pehlivanov <atomnuker gmail com>
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* Copyright (C) 2015 Vittorio Giovara <vittorio.giovara gmail com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdlib.h>
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#include "libavcodec/bytestream.h"
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#include "avformat.h"
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#include "internal.h"
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#include "oggdec.h"
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struct DaalaPixFmtMap {
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enum AVPixelFormat ffmpeg_fmt;
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int depth;
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int planes;
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int xdec[4];
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int ydec[4];
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};
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/* Currently supported formats only */
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static const struct DaalaPixFmtMap list_fmts[] = {
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{ AV_PIX_FMT_YUV420P, 8, 3, {0, 1, 1, 0}, {0, 1, 1, 0} },
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{ AV_PIX_FMT_YUV444P, 8, 3, {0, 0, 0, 0}, {0, 0, 0, 0} }
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};
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typedef struct DaalaInfoHeader {
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int init_d;
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int fpr;
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int gpshift;
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int gpmask;
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int version_maj;
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int version_min;
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int version_sub;
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int frame_duration;
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int keyframe_granule_shift;
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struct DaalaPixFmtMap format;
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} DaalaInfoHeader;
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static inline int daala_match_pix_fmt(struct DaalaPixFmtMap *fmt)
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{
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int i, j;
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for (i = 0; i < FF_ARRAY_ELEMS(list_fmts); i++) {
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int match = 0;
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if (fmt->depth != list_fmts[i].depth)
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continue;
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if (fmt->planes != list_fmts[i].planes)
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continue;
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for (j = 0; j < fmt->planes; j++) {
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if (fmt->xdec[j] != list_fmts[i].xdec[j])
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continue;
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if (fmt->ydec[j] != list_fmts[i].ydec[j])
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continue;
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match++;
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}
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if (match == fmt->planes)
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return list_fmts[i].ffmpeg_fmt;
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}
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return -1;
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}
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static int daala_header(AVFormatContext *s, int idx)
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{
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int i, err;
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uint8_t *cdp;
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GetByteContext gb;
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AVRational timebase;
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struct ogg *ogg = s->priv_data;
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struct ogg_stream *os = ogg->streams + idx;
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AVStream *st = s->streams[idx];
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int cds = st->codecpar->extradata_size + os->psize + 2;
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DaalaInfoHeader *hdr = os->private;
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if (!(os->buf[os->pstart] & 0x80))
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return 0;
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if (!hdr) {
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hdr = av_mallocz(sizeof(*hdr));
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if (!hdr)
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return AVERROR(ENOMEM);
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os->private = hdr;
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}
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switch (os->buf[os->pstart]) {
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case 0x80:
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bytestream2_init(&gb, os->buf + os->pstart, os->psize);
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bytestream2_skip(&gb, ff_daala_codec.magicsize);
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hdr->version_maj = bytestream2_get_byte(&gb);
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hdr->version_min = bytestream2_get_byte(&gb);
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hdr->version_sub = bytestream2_get_byte(&gb);
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st->codecpar->width = bytestream2_get_ne32(&gb);
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st->codecpar->height = bytestream2_get_ne32(&gb);
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st->sample_aspect_ratio.num = bytestream2_get_ne32(&gb);
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st->sample_aspect_ratio.den = bytestream2_get_ne32(&gb);
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timebase.num = bytestream2_get_ne32(&gb);
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timebase.den = bytestream2_get_ne32(&gb);
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if (timebase.num < 0 && timebase.den < 0) {
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av_log(s, AV_LOG_WARNING, "Invalid timebase, assuming 30 FPS\n");
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timebase.num = 1;
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timebase.den = 30;
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}
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avpriv_set_pts_info(st, 64, timebase.den, timebase.num);
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hdr->frame_duration = bytestream2_get_ne32(&gb);
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hdr->gpshift = bytestream2_get_byte(&gb);
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if (hdr->gpshift >= 32) {
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av_log(s, AV_LOG_ERROR, "Too large gpshift %d (>= 32).\n",
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hdr->gpshift);
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hdr->gpshift = 0;
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return AVERROR_INVALIDDATA;
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}
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hdr->gpmask = (1U << hdr->gpshift) - 1;
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hdr->format.depth = 8 + 2*(bytestream2_get_byte(&gb)-1);
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hdr->fpr = bytestream2_get_byte(&gb);
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hdr->format.planes = bytestream2_get_byte(&gb);
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if (hdr->format.planes > 4) {
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av_log(s, AV_LOG_ERROR,
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"Invalid number of planes %d in daala pixel format map.\n",
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hdr->format.planes);
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return AVERROR_INVALIDDATA;
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}
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for (i = 0; i < hdr->format.planes; i++) {
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hdr->format.xdec[i] = bytestream2_get_byte(&gb);
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hdr->format.ydec[i] = bytestream2_get_byte(&gb);
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}
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if ((st->codecpar->format = daala_match_pix_fmt(&hdr->format)) < 0)
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av_log(s, AV_LOG_ERROR, "Unsupported pixel format - %i %i\n",
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hdr->format.depth, hdr->format.planes);
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st->codecpar->codec_id = AV_CODEC_ID_DAALA;
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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st->need_parsing = AVSTREAM_PARSE_HEADERS;
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hdr->init_d = 1;
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break;
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case 0x81:
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if (!hdr->init_d)
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return AVERROR_INVALIDDATA;
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ff_vorbis_stream_comment(s, st,
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os->buf + os->pstart + ff_daala_codec.magicsize,
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os->psize - ff_daala_codec.magicsize);
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break;
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case 0x82:
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if (!hdr->init_d)
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return AVERROR_INVALIDDATA;
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break;
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default:
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av_log(s, AV_LOG_ERROR, "Unknown header type %X\n", os->buf[os->pstart]);
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return AVERROR_INVALIDDATA;
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break;
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}
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if ((err = av_reallocp(&st->codecpar->extradata,
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cds + AV_INPUT_BUFFER_PADDING_SIZE)) < 0) {
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st->codecpar->extradata_size = 0;
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return err;
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}
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memset(st->codecpar->extradata + cds, 0, AV_INPUT_BUFFER_PADDING_SIZE);
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cdp = st->codecpar->extradata + st->codecpar->extradata_size;
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*cdp++ = os->psize >> 8;
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*cdp++ = os->psize & 0xff;
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memcpy(cdp, os->buf + os->pstart, os->psize);
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st->codecpar->extradata_size = cds;
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return 1;
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}
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static uint64_t daala_gptopts(AVFormatContext *ctx, int idx, uint64_t gp,
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int64_t *dts)
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{
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uint64_t iframe, pframe;
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struct ogg *ogg = ctx->priv_data;
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struct ogg_stream *os = ogg->streams + idx;
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DaalaInfoHeader *hdr = os->private;
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if (!hdr)
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return AV_NOPTS_VALUE;
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iframe = gp >> hdr->gpshift;
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pframe = gp & hdr->gpmask;
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if (!pframe)
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os->pflags |= AV_PKT_FLAG_KEY;
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if (dts)
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*dts = iframe + pframe;
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return iframe + pframe;
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}
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static int daala_packet(AVFormatContext *s, int idx)
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{
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int seg, duration = 1;
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struct ogg *ogg = s->priv_data;
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struct ogg_stream *os = ogg->streams + idx;
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int64_t pts;
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/*
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* first packet handling: here we parse the duration of each packet in the
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* first page and compare the total duration to the page granule to find the
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* encoder delay and set the first timestamp
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*/
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if ((!os->lastpts || os->lastpts == AV_NOPTS_VALUE) && !(os->flags & OGG_FLAG_EOS)) {
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for (seg = os->segp; seg < os->nsegs; seg++)
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if (os->segments[seg] < 255)
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duration++;
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pts = daala_gptopts(s, idx, os->granule, NULL);
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if (pts != AV_NOPTS_VALUE)
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pts -= duration;
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os->lastpts = os->lastdts = pts;
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if(s->streams[idx]->start_time == AV_NOPTS_VALUE) {
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s->streams[idx]->start_time = os->lastpts;
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if (s->streams[idx]->duration != AV_NOPTS_VALUE)
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s->streams[idx]->duration -= s->streams[idx]->start_time;
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}
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}
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/* parse packet duration */
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if (os->psize > 0)
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os->pduration = 1;
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return 0;
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}
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const struct ogg_codec ff_daala_codec = {
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.name = "Daala",
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.magic = "\200daala",
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.magicsize = 6,
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.header = daala_header,
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.packet = daala_packet,
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.gptopts = daala_gptopts,
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.granule_is_start = 1,
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.nb_header = 3,
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};
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