From f5275b3ce749ecb47c04fff49f8a29bcfbe13254 Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Thu, 22 May 2008 22:07:09 +0000 Subject: [PATCH] demux chapters out of matroska patch by Anton Khirnov wyskas _at_ gmail _dot_ com Originally committed as revision 13241 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavformat/matroska.h | 13 ++++ libavformat/matroskadec.c | 157 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 170 insertions(+) diff --git a/libavformat/matroska.h b/libavformat/matroska.h index c4a5c23274..592e4b140d 100644 --- a/libavformat/matroska.h +++ b/libavformat/matroska.h @@ -57,6 +57,7 @@ #define MATROSKA_ID_SEEKHEAD 0x114D9B74 #define MATROSKA_ID_ATTACHMENTS 0x1941A469 #define MATROSKA_ID_CLUSTER 0x1F43B675 +#define MATROSKA_ID_CHAPTERS 0x1043A770 /* IDs in the info master */ #define MATROSKA_ID_TIMECODESCALE 0x2AD7B1 @@ -155,6 +156,18 @@ #define MATROSKA_ID_FILEDATA 0x465C #define MATROSKA_ID_FILEUID 0x46AE +/* IDs in the chapters master */ +#define MATROSKA_ID_EDITIONENTRY 0x45B9 +#define MATROSKA_ID_CHAPTERATOM 0xB6 +#define MATROSKA_ID_CHAPTERTIMESTART 0x91 +#define MATROSKA_ID_CHAPTERTIMEEND 0x92 +#define MATROSKA_ID_CHAPTERDISPLAY 0x80 +#define MATROSKA_ID_CHAPSTRING 0x85 +#define MATROSKA_ID_EDITIONUID 0x45BC +#define MATROSKA_ID_EDITIONFLAGHIDDEN 0x45BD +#define MATROSKA_ID_CHAPTERUID 0x73C4 +#define MATROSKA_ID_CHAPTERFLAGHIDDEN 0x98 + typedef enum { MATROSKA_TRACK_TYPE_NONE = 0x0, MATROSKA_TRACK_TYPE_VIDEO = 0x1, diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c index 9c65a5b9cc..2b6f2ba494 100644 --- a/libavformat/matroskadec.c +++ b/libavformat/matroskadec.c @@ -2139,6 +2139,156 @@ matroska_parse_attachments(AVFormatContext *s) return res; } +static int +matroska_parse_chapters(AVFormatContext *s) +{ + MatroskaDemuxContext *matroska = s->priv_data; + int res = 0; + uint32_t id; + + av_log(s, AV_LOG_DEBUG, "parsing chapters...\n"); + + while (res == 0) { + if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { + res = AVERROR(EIO); + break; + } else if (matroska->level_up) { + matroska->level_up--; + break; + } + + switch (id) { + case MATROSKA_ID_EDITIONENTRY: { + uint64_t end = AV_NOPTS_VALUE, start = AV_NOPTS_VALUE; + char* title = NULL; + /* if there is more than one chapter edition + we take only the first one */ + if(s->chapters) { + ebml_read_skip(matroska); + break; + } + + if ((res = ebml_read_master(matroska, &id)) < 0) + break; + + while (res == 0) { + if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { + res = AVERROR(EIO); + break; + } else if (matroska->level_up) { + matroska->level_up--; + break; + } + + switch (id) { + case MATROSKA_ID_CHAPTERATOM: + if ((res = ebml_read_master(matroska, &id)) < 0) + break; + + while (res == 0) { + if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { + res = AVERROR(EIO); + break; + } else if (matroska->level_up) { + matroska->level_up--; + break; + } + + switch (id) { + case MATROSKA_ID_CHAPTERTIMEEND: + res = ebml_read_uint(matroska, &id, &end); + break; + + case MATROSKA_ID_CHAPTERTIMESTART: + res = ebml_read_uint(matroska, &id, &start); + break; + + case MATROSKA_ID_CHAPTERDISPLAY: + if ((res = ebml_read_master(matroska, &id)) < 0) + break; + + while (res == 0) { + if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { + res = AVERROR(EIO); + break; + } else if (matroska->level_up) { + matroska->level_up--; + break; + } + + switch (id) { + case MATROSKA_ID_CHAPSTRING: + res = ebml_read_utf8(matroska, &id, &title); + break; + + default: + av_log(s, AV_LOG_INFO, "Ignoring unknown Chapter display ID 0x%x\n", id); + case EBML_ID_VOID: + res = ebml_read_skip(matroska); + break; + } + + if (matroska->level_up) { + matroska->level_up--; + break; + } + } + break; + + default: + av_log(s, AV_LOG_INFO, "Ignoring unknown Chapter atom ID 0x%x\n", id); + case MATROSKA_ID_CHAPTERUID: + case MATROSKA_ID_CHAPTERFLAGHIDDEN: + case EBML_ID_VOID: + res = ebml_read_skip(matroska); + break; + } + + if (matroska->level_up) { + matroska->level_up--; + break; + } + } + + if(start != AV_NOPTS_VALUE && end != AV_NOPTS_VALUE) + res = ff_new_chapter(s, start * AV_TIME_BASE / 1000000000 , end * AV_TIME_BASE / 1000000000, title ? title : "(unnamed)"); + av_free(title); + break; + + default: + av_log(s, AV_LOG_INFO, "Ignoring unknown Edition entry ID 0x%x\n", id); + case MATROSKA_ID_EDITIONUID: + case MATROSKA_ID_EDITIONFLAGHIDDEN: + case EBML_ID_VOID: + res = ebml_read_skip(matroska); + break; + } + + + if (matroska->level_up) { + matroska->level_up--; + break; + } + } + break; + } + + default: + av_log(s, AV_LOG_INFO, "Expected an Edition entry (0x%x), but found 0x%x\n", MATROSKA_ID_EDITIONENTRY, id); + case EBML_ID_VOID: + res = ebml_read_skip(matroska); + break; + } + + if (matroska->level_up) { + matroska->level_up--; + break; + } + } + + return res; +} + #define ARRAY_SIZE(x) (sizeof(x)/sizeof(*x)) static int @@ -2291,6 +2441,13 @@ matroska_read_header (AVFormatContext *s, break; } + case MATROSKA_ID_CHAPTERS: { + if ((res = ebml_read_master(matroska, &id)) < 0) + return res; + res = matroska_parse_chapters(s); + break; + } + default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown matroska file header ID 0x%x\n", id);