3 * Copyright (C) 2015 Rostislav Pehlivanov <atomnuker gmail com>
4 * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara gmail com>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libavcodec/bytestream.h"
29 struct DaalaPixFmtMap {
30 enum AVPixelFormat ffmpeg_fmt;
37 /* Currently supported formats only */
38 static const struct DaalaPixFmtMap list_fmts[] = {
39 { AV_PIX_FMT_YUV420P, 8, 3, {0, 1, 1, 0}, {0, 1, 1, 0} },
40 { AV_PIX_FMT_YUV444P, 8, 3, {0, 0, 0, 0}, {0, 0, 0, 0} }
43 typedef struct DaalaInfoHeader {
51 int keyframe_granule_shift;
52 struct DaalaPixFmtMap format;
55 static inline int daala_match_pix_fmt(struct DaalaPixFmtMap *fmt)
58 for (i = 0; i < FF_ARRAY_ELEMS(list_fmts); i++) {
60 if (fmt->depth != list_fmts[i].depth)
62 if (fmt->planes != list_fmts[i].planes)
64 for (j = 0; j < fmt->planes; j++) {
65 if (fmt->xdec[j] != list_fmts[i].xdec[j])
67 if (fmt->ydec[j] != list_fmts[i].ydec[j])
71 if (match == fmt->planes)
72 return list_fmts[i].ffmpeg_fmt;
77 static int daala_header(AVFormatContext *s, int idx)
83 struct ogg *ogg = s->priv_data;
84 struct ogg_stream *os = ogg->streams + idx;
85 AVStream *st = s->streams[idx];
86 int cds = st->codec->extradata_size + os->psize + 2;
87 DaalaInfoHeader *hdr = os->private;
89 if (!(os->buf[os->pstart] & 0x80))
93 hdr = av_mallocz(sizeof(*hdr));
95 return AVERROR(ENOMEM);
99 switch (os->buf[os->pstart]) {
101 bytestream2_init(&gb, os->buf + os->pstart, os->psize);
102 bytestream2_skip(&gb, ff_daala_codec.magicsize);
104 hdr->version_maj = bytestream2_get_byte(&gb);
105 hdr->version_min = bytestream2_get_byte(&gb);
106 hdr->version_sub = bytestream2_get_byte(&gb);
108 st->codec->width = bytestream2_get_ne32(&gb);
109 st->codec->height = bytestream2_get_ne32(&gb);
111 st->sample_aspect_ratio.num = bytestream2_get_ne32(&gb);
112 st->sample_aspect_ratio.den = bytestream2_get_ne32(&gb);
114 timebase.num = bytestream2_get_ne32(&gb);
115 timebase.den = bytestream2_get_ne32(&gb);
116 if (timebase.num < 0 && timebase.den < 0) {
117 av_log(s, AV_LOG_WARNING, "Invalid timebase, assuming 30 FPS\n");
121 avpriv_set_pts_info(st, 64, timebase.den, timebase.num);
123 hdr->frame_duration = bytestream2_get_ne32(&gb);
124 hdr->gpshift = bytestream2_get_byte(&gb);
125 hdr->gpmask = (1 << hdr->gpshift) - 1;
127 hdr->format.depth = 8 + 2*(bytestream2_get_byte(&gb)-1);
128 hdr->format.planes = bytestream2_get_byte(&gb);
129 for (i = 0; i < hdr->format.planes; i++) {
130 hdr->format.xdec[i] = bytestream2_get_byte(&gb);
131 hdr->format.ydec[i] = bytestream2_get_byte(&gb);
134 if ((st->codec->pix_fmt = daala_match_pix_fmt(&hdr->format)) < 0)
135 av_log(s, AV_LOG_ERROR, "Unsupported pixel format - %i %i\n",
136 hdr->format.depth, hdr->format.planes);
138 st->codec->codec_id = AV_CODEC_ID_DAALA;
139 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
140 st->need_parsing = AVSTREAM_PARSE_HEADERS;
146 return AVERROR_INVALIDDATA;
147 ff_vorbis_stream_comment(s, st,
148 os->buf + os->pstart + ff_daala_codec.magicsize,
149 os->psize - ff_daala_codec.magicsize);
153 return AVERROR_INVALIDDATA;
156 av_log(s, AV_LOG_ERROR, "Unknown header type %X\n", os->buf[os->pstart]);
157 return AVERROR_INVALIDDATA;
161 if ((err = av_reallocp(&st->codec->extradata,
162 cds + AV_INPUT_BUFFER_PADDING_SIZE)) < 0) {
163 st->codec->extradata_size = 0;
167 memset(st->codec->extradata + cds, 0, AV_INPUT_BUFFER_PADDING_SIZE);
168 cdp = st->codec->extradata + st->codec->extradata_size;
169 *cdp++ = os->psize >> 8;
170 *cdp++ = os->psize & 0xff;
171 memcpy(cdp, os->buf + os->pstart, os->psize);
172 st->codec->extradata_size = cds;
177 static uint64_t daala_gptopts(AVFormatContext *ctx, int idx, uint64_t gp,
180 uint64_t iframe, pframe;
181 struct ogg *ogg = ctx->priv_data;
182 struct ogg_stream *os = ogg->streams + idx;
183 DaalaInfoHeader *hdr = os->private;
186 return AV_NOPTS_VALUE;
188 iframe = gp >> hdr->gpshift;
189 pframe = gp & hdr->gpmask;
192 os->pflags |= AV_PKT_FLAG_KEY;
195 *dts = iframe + pframe;
197 return iframe + pframe;
200 static int daala_packet(AVFormatContext *s, int idx)
202 int seg, duration = 1;
203 struct ogg *ogg = s->priv_data;
204 struct ogg_stream *os = ogg->streams + idx;
207 * first packet handling: here we parse the duration of each packet in the
208 * first page and compare the total duration to the page granule to find the
209 * encoder delay and set the first timestamp
212 if ((!os->lastpts || os->lastpts == AV_NOPTS_VALUE) && !(os->flags & OGG_FLAG_EOS)) {
213 for (seg = os->segp; seg < os->nsegs; seg++)
214 if (os->segments[seg] < 255)
217 os->lastpts = os->lastdts = daala_gptopts(s, idx, os->granule, NULL) - duration;
218 if(s->streams[idx]->start_time == AV_NOPTS_VALUE) {
219 s->streams[idx]->start_time = os->lastpts;
220 if (s->streams[idx]->duration)
221 s->streams[idx]->duration -= s->streams[idx]->start_time;
225 /* parse packet duration */
232 const struct ogg_codec ff_daala_codec = {
234 .magic = "\200daala",
236 .header = daala_header,
237 .packet = daala_packet,
238 .gptopts = daala_gptopts,
239 .granule_is_start = 1,