[FFmpeg-devel] [PATCH] lavf/aiffenc: ID3 tags support

Matthieu Bouron matthieu.bouron at gmail.com
Mon Jan 7 21:07:17 CET 2013


On Mon, Jan 07, 2013 at 02:04:44PM +0100, Matthieu Bouron wrote:
> On Mon, Jan 07, 2013 at 12:39:26PM +0100, Cl??ment B??sch wrote:
> > On Sun, Jan 06, 2013 at 12:26:24AM +0100, Matthieu Bouron wrote:
> > > ---
> > >  libavformat/Makefile  |   2 +-
> > >  libavformat/aiffenc.c | 151 ++++++++++++++++++++++++++++++++++++++++++++++----
> > >  tests/ref/lavf/aiff   |   4 +-
> > >  3 files changed, 142 insertions(+), 15 deletions(-)
> > > 
> > > diff --git a/libavformat/Makefile b/libavformat/Makefile
> > > index 2266dee..a60a971 100644
> > > --- a/libavformat/Makefile
> > > +++ b/libavformat/Makefile
> > > @@ -60,7 +60,7 @@ OBJS-$(CONFIG_AEA_DEMUXER)               += aea.o pcm.o
> > >  OBJS-$(CONFIG_AFC_DEMUXER)               += afc.o
> > >  OBJS-$(CONFIG_AIFF_DEMUXER)              += aiffdec.o pcm.o isom.o \
> > >                                              mov_chan.o
> > > -OBJS-$(CONFIG_AIFF_MUXER)                += aiffenc.o isom.o rawenc.o
> > > +OBJS-$(CONFIG_AIFF_MUXER)                += aiffenc.o isom.o id3v2enc.o
> > >  OBJS-$(CONFIG_AMR_DEMUXER)               += amr.o
> > >  OBJS-$(CONFIG_AMR_MUXER)                 += amr.o
> > >  OBJS-$(CONFIG_ANM_DEMUXER)               += anm.o
> > > diff --git a/libavformat/aiffenc.c b/libavformat/aiffenc.c
> > > index 525bd49..0b360bc 100644
> > > --- a/libavformat/aiffenc.c
> > > +++ b/libavformat/aiffenc.c
> > > @@ -20,19 +20,61 @@
> > >   */
> > >  
> > >  #include "libavutil/intfloat.h"
> > > +#include "libavutil/opt.h"
> > >  #include "avformat.h"
> > >  #include "internal.h"
> > >  #include "aiff.h"
> > >  #include "avio_internal.h"
> > >  #include "isom.h"
> > > -#include "rawenc.h"
> > > +#include "id3v2.h"
> > >  
> > > -typedef struct {
> > > +typedef struct AIFFOutputContext {
> > 
> > Do you need to name the struct?
> 
> I probably don't.
> 
> > 
> > > +    const AVClass *class;
> > >      int64_t form;
> > >      int64_t frames;
> > >      int64_t ssnd;
> > > +    int audio_stream_idx;
> > > +    AVPacketList *pict_list;
> > > +    ID3v2EncContext id3v2;
> > > +    int id3v2_version;
> > >  } AIFFOutputContext;
> > >  
> > > +static int put_id3v2_tags(AVFormatContext *s, AIFFOutputContext *aiff)
> > > +{
> > > +    int ret;
> > > +    uint64_t pos, end;
> > > +    AVIOContext *pb = s->pb;
> > > +    AVPacketList *pict_list = aiff->pict_list;
> > > +
> > > +    if (!pb->seekable)
> > > +        return 0;
> > > +
> > > +    if (!av_dict_count(s->metadata))
> > > +        return 0;
> > > +
> > > +    avio_wl32(pb, MKTAG('I', 'D', '3', ' '));
> > 
> > Since the format is big endian based maybe avio_wb32(pb, MKBETAG(...))
> > would make more sense.
> 
> Makes sense however the rest of the code use the avio_wl32 + MKTAG, so i
> prefer to keep it as is.
> 
> > 
> > > +    avio_wb32(pb, 0);
> > > +    pos = avio_tell(pb);
> > > +
> > > +    ff_id3v2_start(&aiff->id3v2, pb, aiff->id3v2_version, ID3v2_DEFAULT_MAGIC);
> > > +    ff_id3v2_write_metadata(s, &aiff->id3v2);
> > > +    while (pict_list) {
> > > +        if ((ret = ff_id3v2_write_apic(s, &aiff->id3v2, &pict_list->pkt)) < 0)
> > > +            return ret;
> > > +        pict_list = pict_list->next;
> > > +    }
> > > +    ff_id3v2_finish(&aiff->id3v2, pb);
> > > +
> > > +    end = avio_tell(pb);
> > > +
> > > +    /* Update chunk size */
> > > +    avio_seek(pb, pos - 4, SEEK_SET);
> > > +    avio_wb32(pb, end - pos);
> > > +    avio_seek(pb, end, SEEK_SET);
> > > +
> > > +    return 0;
> > > +}
> > > +
> > >  static void put_meta(AVFormatContext *s, const char *key, uint32_t id)
> > >  {
> > >      AVDictionaryEntry *tag;
> > > @@ -53,9 +95,26 @@ static int aiff_write_header(AVFormatContext *s)
> > >  {
> > >      AIFFOutputContext *aiff = s->priv_data;
> > >      AVIOContext *pb = s->pb;
> > > -    AVCodecContext *enc = s->streams[0]->codec;
> > > +    AVCodecContext *enc;
> > >      uint64_t sample_rate;
> > > -    int aifc = 0;
> > > +    int i, aifc = 0;
> > > +
> > > +    aiff->audio_stream_idx = -1;
> > > +    for (i = 0; i < s->nb_streams; i++) {
> > > +        AVStream *st = s->streams[i];
> > > +        if (aiff->audio_stream_idx < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
> > > +            aiff->audio_stream_idx = i;
> > > +        } else if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO) {
> > > +            av_log(s, AV_LOG_ERROR, "Only audio streams and pictures are allowed in AIFF.\n");
> > > +            return AVERROR(EINVAL);
> > > +        }
> > > +    }
> > > +    if (aiff->audio_stream_idx < 0) {
> > > +        av_log(s, AV_LOG_ERROR, "No audio stream present.\n");
> > > +        return AVERROR(EINVAL);
> > > +    }
> > > +
> > > +    enc = s->streams[aiff->audio_stream_idx]->codec;
> > >  
> > >      /* First verify if format is ok */
> > >      if (!enc->codec_tag)
> > > @@ -132,7 +191,8 @@ static int aiff_write_header(AVFormatContext *s)
> > >      avio_wb32(pb, 0);                    /* Data offset */
> > >      avio_wb32(pb, 0);                    /* Block-size (block align) */
> > >  
> > > -    avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
> > > +    avpriv_set_pts_info(s->streams[aiff->audio_stream_idx], 64, 1,
> > > +                        s->streams[aiff->audio_stream_idx]->codec->sample_rate);
> > >  
> > >      /* Data is starting here */
> > >      avio_flush(pb);
> > > @@ -140,11 +200,50 @@ static int aiff_write_header(AVFormatContext *s)
> > >      return 0;
> > >  }
> > >  
> > > +static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt)
> > > +{
> > > +    AIFFOutputContext *aiff = s->priv_data;
> > > +    AVIOContext *pb = s->pb;
> > > +    if (pkt->stream_index == aiff->audio_stream_idx)
> > > +        avio_write(pb, pkt->data, pkt->size);
> > > +    else {
> > > +        int ret;
> > > +        AVPacketList *pict_list, *last;
> > > +
> > 
> > > +        if (s->streams[pkt->stream_index]->codec->codec_type != AVMEDIA_TYPE_VIDEO)
> > > +            return 0;
> > 
> > This should not happen, what about a av_assert0()?
> > 
> > > +
> > > +        if (s->streams[pkt->stream_index]->nb_frames >= 1)
> > > +            return 0;
> > > +
> > 
> > Please mux the first one and print a warning (think of an animated gif or
> > png, where the user hasn't realized there are several images).
> > 
> > > +        pict_list = av_mallocz(sizeof(AVPacketList));
> > > +        if (!pict_list)
> > > +            return AVERROR(ENOMEM);
> > > +
> > > +        if ((ret = av_copy_packet(&pict_list->pkt, pkt)) < 0)
> > > +            return ret;
> > > +
> > > +        if (!aiff->pict_list)
> > > +            aiff->pict_list = pict_list;
> > > +        else {
> > > +            last = aiff->pict_list;
> > > +            while (last->next)
> > > +                last = last->next;
> > > +            last->next = pict_list;
> > 
> > I may be misunderstanding the code, but why do you build a list if you're
> > only storing one picture?
> 
> You can put several pictures in the ID3 tags: covert art, waveform, ...
> 
> > 
> > BTW, can't this code be factorized somewhere with the mp3 muxer, in
> > lavf/utils or something?
> 
> Not sure if this can be factorized easily since the mp3enc code does not
> use an AVPictureList and write directly the apic frames into the stream.
> 
> > 
> > > +        }
> > > +    }
> > > +
> > > +    return 0;
> > > +}
> > > +
> > > +
> > >  static int aiff_write_trailer(AVFormatContext *s)
> > >  {
> > > +    int ret;
> > >      AVIOContext *pb = s->pb;
> > >      AIFFOutputContext *aiff = s->priv_data;
> > > -    AVCodecContext *enc = s->streams[0]->codec;
> > > +    AVPacketList *pict_list = aiff->pict_list;
> > > +    AVCodecContext *enc = s->streams[aiff->audio_stream_idx]->codec;
> > >  
> > >      /* Chunks sizes must be even */
> > >      int64_t file_size, end_size;
> > > @@ -155,10 +254,6 @@ static int aiff_write_trailer(AVFormatContext *s)
> > >      }
> > >  
> > >      if (s->pb->seekable) {
> > > -        /* File length */
> > > -        avio_seek(pb, aiff->form, SEEK_SET);
> > > -        avio_wb32(pb, file_size - aiff->form - 4);
> > > -
> > >          /* Number of sample frames */
> > >          avio_seek(pb, aiff->frames, SEEK_SET);
> > >          avio_wb32(pb, (file_size-aiff->ssnd-12)/enc->block_align);
> > > @@ -170,12 +265,43 @@ static int aiff_write_trailer(AVFormatContext *s)
> > >          /* return to the end */
> > >          avio_seek(pb, end_size, SEEK_SET);
> > >  
> > > +        /* Write ID3 tags */
> > > +        if ((ret = put_id3v2_tags(s, aiff)) < 0)
> > > +            return ret;
> > > +
> > > +        /* File length */
> > > +        file_size = avio_tell(pb);
> > > +        avio_seek(pb, aiff->form, SEEK_SET);
> > > +        avio_wb32(pb, file_size - aiff->form - 4);
> > > +
> > >          avio_flush(pb);
> > >      }
> > >  
> > > +    while (pict_list) {
> > > +        AVPacketList *next = pict_list->next;
> > > +        av_free_packet(&pict_list->pkt);
> > > +        av_freep(&pict_list);
> > > +        pict_list = next;
> > > +    }
> > > +
> > >      return 0;
> > >  }
> > >  
> > > +#define OFFSET(x) offsetof(AIFFOutputContext, x)
> > > +#define DEC AV_OPT_FLAG_DECODING_PARAM
> > > +static const AVOption options[] = {
> > > +    { "id3v2_version", "Select ID3v2 version to write. Currently 3 and 4 are supported.",
> > > +      OFFSET(id3v2_version), AV_OPT_TYPE_INT, {.i64 = 4}, 3, 4, DEC },
> > 
> > Decoding param? I believe it should be an encoding flag.
> 
> Indeed.
> 
> > 
> > > +    { NULL },
> > > +};
> > > +
> > > +static const AVClass aiff_muxer_class = {
> > > +    .class_name     = "AIFF muxer",
> > > +    .item_name      = av_default_item_name,
> > > +    .option         = options,
> > > +    .version        = LIBAVUTIL_VERSION_INT,
> > > +};
> > > +
> > >  AVOutputFormat ff_aiff_muxer = {
> > >      .name              = "aiff",
> > >      .long_name         = NULL_IF_CONFIG_SMALL("Audio IFF"),
> > > @@ -183,9 +309,10 @@ AVOutputFormat ff_aiff_muxer = {
> > >      .extensions        = "aif,aiff,afc,aifc",
> > >      .priv_data_size    = sizeof(AIFFOutputContext),
> > >      .audio_codec       = AV_CODEC_ID_PCM_S16BE,
> > > -    .video_codec       = AV_CODEC_ID_NONE,
> > > +    .video_codec       = AV_CODEC_ID_PNG,
> > >      .write_header      = aiff_write_header,
> > > -    .write_packet      = ff_raw_write_packet,
> > > +    .write_packet      = aiff_write_packet,
> > >      .write_trailer     = aiff_write_trailer,
> > >      .codec_tag         = (const AVCodecTag* const []){ ff_codec_aiff_tags, 0 },
> > > +    .priv_class        = &aiff_muxer_class,
> > >  };
> > > diff --git a/tests/ref/lavf/aiff b/tests/ref/lavf/aiff
> > > index 2a5cd81..8b8c489 100644
> > > --- a/tests/ref/lavf/aiff
> > > +++ b/tests/ref/lavf/aiff
> > > @@ -1,3 +1,3 @@
> > > -b0d42747a6fc99a5cd1ab0e861671f3a *./tests/data/lavf/lavf.aif
> > > -90182 ./tests/data/lavf/lavf.aif
> > > +731d863ff976966827a166fa30b32400 *./tests/data/lavf/lavf.aif
> > > +90220 ./tests/data/lavf/lavf.aif
> > 
> > Why is the test changing? A picture is muxed in now?
> 
> The title field is set to "lavftest" in the metadata, so it triggers the
> ID3 tags writting.
> 
> [...]

Patch updated.
I also added an option to trigger ID3 tags writting (-write_id3v2) as Paul
suggested.
The covert arts are handled with the same stream based logic. Since mp3enc
and wtvenc use this logic, i think it's ok to stick with it until a
cleaner solution is found.

Regards,
Matthieu
-------------- next part --------------
>From a83e6cb83e7a8705e6a1d0e34151a45aaf048245 Mon Sep 17 00:00:00 2001
From: Matthieu Bouron <matthieu.bouron at gmail.com>
Date: Fri, 4 Jan 2013 21:19:40 +0100
Subject: [PATCH] lavf/aiffenc: ID3 tags support

---
 libavformat/Makefile  |   2 +-
 libavformat/aiffenc.c | 157 ++++++++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 147 insertions(+), 12 deletions(-)

diff --git a/libavformat/Makefile b/libavformat/Makefile
index 2266dee..a60a971 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -60,7 +60,7 @@ OBJS-$(CONFIG_AEA_DEMUXER)               += aea.o pcm.o
 OBJS-$(CONFIG_AFC_DEMUXER)               += afc.o
 OBJS-$(CONFIG_AIFF_DEMUXER)              += aiffdec.o pcm.o isom.o \
                                             mov_chan.o
-OBJS-$(CONFIG_AIFF_MUXER)                += aiffenc.o isom.o rawenc.o
+OBJS-$(CONFIG_AIFF_MUXER)                += aiffenc.o isom.o id3v2enc.o
 OBJS-$(CONFIG_AMR_DEMUXER)               += amr.o
 OBJS-$(CONFIG_AMR_MUXER)                 += amr.o
 OBJS-$(CONFIG_ANM_DEMUXER)               += anm.o
diff --git a/libavformat/aiffenc.c b/libavformat/aiffenc.c
index 525bd49..41ba761 100644
--- a/libavformat/aiffenc.c
+++ b/libavformat/aiffenc.c
@@ -20,19 +20,62 @@
  */
 
 #include "libavutil/intfloat.h"
+#include "libavutil/opt.h"
 #include "avformat.h"
 #include "internal.h"
 #include "aiff.h"
 #include "avio_internal.h"
 #include "isom.h"
-#include "rawenc.h"
+#include "id3v2.h"
 
 typedef struct {
+    const AVClass *class;
     int64_t form;
     int64_t frames;
     int64_t ssnd;
+    int audio_stream_idx;
+    AVPacketList *pict_list;
+    ID3v2EncContext id3v2;
+    int write_id3v2;
+    int id3v2_version;
 } AIFFOutputContext;
 
+static int put_id3v2_tags(AVFormatContext *s, AIFFOutputContext *aiff)
+{
+    int ret;
+    uint64_t pos, end;
+    AVIOContext *pb = s->pb;
+    AVPacketList *pict_list = aiff->pict_list;
+
+    if (!pb->seekable)
+        return 0;
+
+    if (!av_dict_count(s->metadata))
+        return 0;
+
+    avio_wl32(pb, MKTAG('I', 'D', '3', ' '));
+    avio_wb32(pb, 0);
+    pos = avio_tell(pb);
+
+    ff_id3v2_start(&aiff->id3v2, pb, aiff->id3v2_version, ID3v2_DEFAULT_MAGIC);
+    ff_id3v2_write_metadata(s, &aiff->id3v2);
+    while (pict_list) {
+        if ((ret = ff_id3v2_write_apic(s, &aiff->id3v2, &pict_list->pkt)) < 0)
+            return ret;
+        pict_list = pict_list->next;
+    }
+    ff_id3v2_finish(&aiff->id3v2, pb);
+
+    end = avio_tell(pb);
+
+    /* Update chunk size */
+    avio_seek(pb, pos - 4, SEEK_SET);
+    avio_wb32(pb, end - pos);
+    avio_seek(pb, end, SEEK_SET);
+
+    return 0;
+}
+
 static void put_meta(AVFormatContext *s, const char *key, uint32_t id)
 {
     AVDictionaryEntry *tag;
@@ -53,9 +96,26 @@ static int aiff_write_header(AVFormatContext *s)
 {
     AIFFOutputContext *aiff = s->priv_data;
     AVIOContext *pb = s->pb;
-    AVCodecContext *enc = s->streams[0]->codec;
+    AVCodecContext *enc;
     uint64_t sample_rate;
-    int aifc = 0;
+    int i, aifc = 0;
+
+    aiff->audio_stream_idx = -1;
+    for (i = 0; i < s->nb_streams; i++) {
+        AVStream *st = s->streams[i];
+        if (aiff->audio_stream_idx < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+            aiff->audio_stream_idx = i;
+        } else if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO) {
+            av_log(s, AV_LOG_ERROR, "Only audio streams and pictures are allowed in AIFF.\n");
+            return AVERROR(EINVAL);
+        }
+    }
+    if (aiff->audio_stream_idx < 0) {
+        av_log(s, AV_LOG_ERROR, "No audio stream present.\n");
+        return AVERROR(EINVAL);
+    }
+
+    enc = s->streams[aiff->audio_stream_idx]->codec;
 
     /* First verify if format is ok */
     if (!enc->codec_tag)
@@ -132,7 +192,8 @@ static int aiff_write_header(AVFormatContext *s)
     avio_wb32(pb, 0);                    /* Data offset */
     avio_wb32(pb, 0);                    /* Block-size (block align) */
 
-    avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
+    avpriv_set_pts_info(s->streams[aiff->audio_stream_idx], 64, 1,
+                        s->streams[aiff->audio_stream_idx]->codec->sample_rate);
 
     /* Data is starting here */
     avio_flush(pb);
@@ -140,11 +201,54 @@ static int aiff_write_header(AVFormatContext *s)
     return 0;
 }
 
+static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    AIFFOutputContext *aiff = s->priv_data;
+    AVIOContext *pb = s->pb;
+    if (pkt->stream_index == aiff->audio_stream_idx)
+        avio_write(pb, pkt->data, pkt->size);
+    else {
+        int ret;
+        AVPacketList *pict_list, *last;
+
+        if (s->streams[pkt->stream_index]->codec->codec_type != AVMEDIA_TYPE_VIDEO)
+            return 0;
+
+        /* warn only once for each stream */
+        if (s->streams[pkt->stream_index]->nb_frames == 1) {
+            av_log(s, AV_LOG_WARNING, "Got more than one picture in stream %d,"
+                   " ignoring.\n", pkt->stream_index);
+        }
+        if (s->streams[pkt->stream_index]->nb_frames >= 1)
+            return 0;
+
+        pict_list = av_mallocz(sizeof(AVPacketList));
+        if (!pict_list)
+            return AVERROR(ENOMEM);
+
+        if ((ret = av_copy_packet(&pict_list->pkt, pkt)) < 0)
+            return ret;
+
+        if (!aiff->pict_list)
+            aiff->pict_list = pict_list;
+        else {
+            last = aiff->pict_list;
+            while (last->next)
+                last = last->next;
+            last->next = pict_list;
+        }
+    }
+
+    return 0;
+}
+
 static int aiff_write_trailer(AVFormatContext *s)
 {
+    int ret;
     AVIOContext *pb = s->pb;
     AIFFOutputContext *aiff = s->priv_data;
-    AVCodecContext *enc = s->streams[0]->codec;
+    AVPacketList *pict_list = aiff->pict_list;
+    AVCodecContext *enc = s->streams[aiff->audio_stream_idx]->codec;
 
     /* Chunks sizes must be even */
     int64_t file_size, end_size;
@@ -155,10 +259,6 @@ static int aiff_write_trailer(AVFormatContext *s)
     }
 
     if (s->pb->seekable) {
-        /* File length */
-        avio_seek(pb, aiff->form, SEEK_SET);
-        avio_wb32(pb, file_size - aiff->form - 4);
-
         /* Number of sample frames */
         avio_seek(pb, aiff->frames, SEEK_SET);
         avio_wb32(pb, (file_size-aiff->ssnd-12)/enc->block_align);
@@ -170,12 +270,46 @@ static int aiff_write_trailer(AVFormatContext *s)
         /* return to the end */
         avio_seek(pb, end_size, SEEK_SET);
 
+        /* Write ID3 tags */
+        if (aiff->write_id3v2)
+            if ((ret = put_id3v2_tags(s, aiff)) < 0)
+                return ret;
+
+        /* File length */
+        file_size = avio_tell(pb);
+        avio_seek(pb, aiff->form, SEEK_SET);
+        avio_wb32(pb, file_size - aiff->form - 4);
+
         avio_flush(pb);
     }
 
+    while (pict_list) {
+        AVPacketList *next = pict_list->next;
+        av_free_packet(&pict_list->pkt);
+        av_freep(&pict_list);
+        pict_list = next;
+    }
+
     return 0;
 }
 
+#define OFFSET(x) offsetof(AIFFOutputContext, x)
+#define ENC AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+    { "write_id3v2", "Enable ID3 tags writing.",
+      OFFSET(write_id3v2), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, ENC },
+    { "id3v2_version", "Select ID3v2 version to write. Currently 3 and 4 are supported.",
+      OFFSET(id3v2_version), AV_OPT_TYPE_INT, {.i64 = 4}, 3, 4, ENC },
+    { NULL },
+};
+
+static const AVClass aiff_muxer_class = {
+    .class_name     = "AIFF muxer",
+    .item_name      = av_default_item_name,
+    .option         = options,
+    .version        = LIBAVUTIL_VERSION_INT,
+};
+
 AVOutputFormat ff_aiff_muxer = {
     .name              = "aiff",
     .long_name         = NULL_IF_CONFIG_SMALL("Audio IFF"),
@@ -183,9 +317,10 @@ AVOutputFormat ff_aiff_muxer = {
     .extensions        = "aif,aiff,afc,aifc",
     .priv_data_size    = sizeof(AIFFOutputContext),
     .audio_codec       = AV_CODEC_ID_PCM_S16BE,
-    .video_codec       = AV_CODEC_ID_NONE,
+    .video_codec       = AV_CODEC_ID_PNG,
     .write_header      = aiff_write_header,
-    .write_packet      = ff_raw_write_packet,
+    .write_packet      = aiff_write_packet,
     .write_trailer     = aiff_write_trailer,
     .codec_tag         = (const AVCodecTag* const []){ ff_codec_aiff_tags, 0 },
+    .priv_class        = &aiff_muxer_class,
 };
-- 
1.8.1



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