summaryrefslogtreecommitdiff
path: root/libavformat/oggparsedaala.c
diff options
context:
space:
mode:
Diffstat (limited to 'libavformat/oggparsedaala.c')
-rw-r--r--libavformat/oggparsedaala.c256
1 files changed, 256 insertions, 0 deletions
diff --git a/libavformat/oggparsedaala.c b/libavformat/oggparsedaala.c
new file mode 100644
index 0000000000..89bda58994
--- /dev/null
+++ b/libavformat/oggparsedaala.c
@@ -0,0 +1,256 @@
+/*
+ * 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->codecpar->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->codecpar->width = bytestream2_get_ne32(&gb);
+ st->codecpar->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);
+ if (hdr->gpshift >= 32) {
+ av_log(s, AV_LOG_ERROR, "Too large gpshift %d (>= 32).\n",
+ hdr->gpshift);
+ return AVERROR_INVALIDDATA;
+ }
+ hdr->gpmask = (1U << 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);
+ if (hdr->format.planes > 4) {
+ av_log(s, AV_LOG_ERROR,
+ "Invalid number of planes %d in daala pixel format map.\n",
+ hdr->format.planes);
+ return AVERROR_INVALIDDATA;
+ }
+ 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->codecpar->format = 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->codecpar->codec_id = AV_CODEC_ID_DAALA;
+ st->codecpar->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->codecpar->extradata,
+ cds + AV_INPUT_BUFFER_PADDING_SIZE)) < 0) {
+ st->codecpar->extradata_size = 0;
+ return err;
+ }
+
+ memset(st->codecpar->extradata + cds, 0, AV_INPUT_BUFFER_PADDING_SIZE);
+ cdp = st->codecpar->extradata + st->codecpar->extradata_size;
+ *cdp++ = os->psize >> 8;
+ *cdp++ = os->psize & 0xff;
+ memcpy(cdp, os->buf + os->pstart, os->psize);
+ st->codecpar->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,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-06 07:21:45 +0000