From 1b7a510ff5720d21868f0284c7a50489034bee7d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zsolt=20Vad=C3=A1sz?= <zsolt_vadasz@protonmail.com>
Date: Fri, 10 Mar 2023 11:23:13 +0000
Subject: [PATCH v6 1/2] avformat/flac_picture: Add ff_flac_write_picture
This function is able to write cover art into both FLAC and Ogg files
Signed-off-by: Zsolt Vadasz <zsolt_vadasz@protonmail.com>
---
libavformat/flac_picture.c | 132 +++++++++++++++++++++++++++++++++++++
libavformat/flac_picture.h | 5 ++
libavformat/flacenc.c | 90 +------------------------
3 files changed, 140 insertions(+), 87 deletions(-)
@@ -20,6 +20,9 @@
*/
#include "libavutil/intreadwrite.h"
+#include "libavutil/avstring.h"
+#include "libavutil/base64.h"
+#include "libavutil/pixdesc.h"
#include "libavcodec/bytestream.h"
#include "libavcodec/png.h"
#include "avformat.h"
@@ -188,3 +191,132 @@ fail:
return ret;
}
+
+int ff_flac_write_picture(struct AVFormatContext *s,
+ int isogg,
+ unsigned *attached_types,
+ int audio_stream_idx, // unused if !isogg
+ AVPacket *pkt)
+{
+ AVIOContext *pb = s->pb;
+ const AVPixFmtDescriptor *pixdesc;
+ const CodecMime *mime = ff_id3v2_mime_tags;
+ AVDictionaryEntry *e;
+ const char *mimetype = NULL, *desc = "";
+ const AVStream *st = s->streams[pkt->stream_index];
+ int i, mimelen, desclen, type = 0, blocklen;
+
+ if (!pkt->data)
+ return 0;
+
+ while (mime->id != AV_CODEC_ID_NONE) {
+ if (mime->id == st->codecpar->codec_id) {
+ mimetype = mime->str;
+ break;
+ }
+ mime++;
+ }
+ if (!mimetype) {
+ av_log(s, AV_LOG_ERROR, "No mimetype is known for stream %d, cannot "
+ "write an attached picture.\n", st->index);
+ return AVERROR(EINVAL);
+ }
+ mimelen = strlen(mimetype);
+
+ /* get the picture type */
+ e = av_dict_get(st->metadata, "comment", NULL, 0);
+ for (i = 0; e && i < FF_ARRAY_ELEMS(ff_id3v2_picture_types); i++) {
+ if (!av_strcasecmp(e->value, ff_id3v2_picture_types[i])) {
+ type = i;
+ break;
+ }
+ }
+
+ if (((*attached_types) & (1 << type)) & 0x6) {
+ av_log(s, AV_LOG_ERROR, "Duplicate attachment for type '%s'\n", ff_id3v2_picture_types[type]);
+ return AVERROR(EINVAL);
+ }
+
+ if (type == 1 && (st->codecpar->codec_id != AV_CODEC_ID_PNG ||
+ st->codecpar->width != 32 ||
+ st->codecpar->height != 32)) {
+ av_log(s, AV_LOG_ERROR, "File icon attachment must be a 32x32 PNG");
+ return AVERROR(EINVAL);
+ }
+
+ *attached_types |= (1 << type);
+
+ /* get the description */
+ if ((e = av_dict_get(st->metadata, "title", NULL, 0)))
+ desc = e->value;
+ desclen = strlen(desc);
+
+ blocklen = 4 + 4 + mimelen + 4 + desclen + 4 + 4 + 4 + 4 + 4 + pkt->size;
+ if (blocklen >= 1<<24) {
+ av_log(s, AV_LOG_ERROR, "Picture block too big %d >= %d\n", blocklen, 1<<24);
+ return AVERROR(EINVAL);
+ }
+
+ if(!isogg) {
+ avio_w8(pb, 0x06);
+ avio_wb24(pb, blocklen);
+
+ avio_wb32(pb, type);
+
+ avio_wb32(pb, mimelen);
+ avio_write(pb, mimetype, mimelen);
+
+ avio_wb32(pb, desclen);
+ avio_write(pb, desc, desclen);
+
+ avio_wb32(pb, st->codecpar->width);
+ avio_wb32(pb, st->codecpar->height);
+ if ((pixdesc = av_pix_fmt_desc_get(st->codecpar->format)))
+ avio_wb32(pb, av_get_bits_per_pixel(pixdesc));
+ else
+ avio_wb32(pb, 0);
+ avio_wb32(pb, 0);
+
+ avio_wb32(pb, pkt->size);
+ avio_write(pb, pkt->data, pkt->size);
+ } else {
+ uint8_t *metadata_block_picture, *ptr;
+ int encoded_len, ret;
+ char *encoded;
+ AVStream *audio_stream = s->streams[audio_stream_idx];
+
+ metadata_block_picture = av_mallocz(blocklen);
+ ptr = metadata_block_picture;
+ bytestream_put_be32(&ptr, type);
+
+ bytestream_put_be32(&ptr, mimelen);
+ bytestream_put_buffer(&ptr, mimetype, mimelen);
+
+ bytestream_put_be32(&ptr, desclen);
+ bytestream_put_buffer(&ptr, desc, desclen);
+
+ bytestream_put_be32(&ptr, st->codecpar->width);
+ bytestream_put_be32(&ptr, st->codecpar->height);
+ if ((pixdesc = av_pix_fmt_desc_get(st->codecpar->format)))
+ bytestream_put_be32(&ptr, av_get_bits_per_pixel(pixdesc));
+ else
+ bytestream_put_be32(&ptr, 0);
+ bytestream_put_be32(&ptr, 0);
+
+ bytestream_put_be32(&ptr, pkt->size);
+ bytestream_put_buffer(&ptr, pkt->data, pkt->size);
+
+ encoded_len = AV_BASE64_SIZE(blocklen);
+ encoded = av_mallocz(encoded_len);
+ av_base64_encode(encoded, encoded_len, metadata_block_picture, blocklen);
+ av_free(metadata_block_picture);
+
+ ret = av_dict_set(&audio_stream->metadata, "METADATA_BLOCK_PICTURE", encoded, 0);
+ av_free(encoded);
+ av_packet_unref(pkt);
+
+ if (ret < 0)
+ return ret;
+ }
+ return 0;
+}
@@ -39,5 +39,10 @@
*/
int ff_flac_parse_picture(AVFormatContext *s, uint8_t **buf, int buf_size,
int truncate_workaround);
+int ff_flac_write_picture(struct AVFormatContext *s,
+ int isogg,
+ unsigned *attached_types,
+ int audio_stream_idx,
+ AVPacket *pkt);
#endif /* AVFORMAT_FLAC_PICTURE_H */
@@ -33,6 +33,7 @@
#include "mux.h"
#include "version.h"
#include "vorbiscomment.h"
+#include "flac_picture.h"
typedef struct FlacMuxerContext {
@@ -79,94 +80,9 @@ static int flac_write_block_comment(AVIOContext *pb, AVDictionary **m,
return 0;
}
-static int flac_write_picture(struct AVFormatContext *s, AVPacket *pkt)
-{
- FlacMuxerContext *c = s->priv_data;
- AVIOContext *pb = s->pb;
- const AVPixFmtDescriptor *pixdesc;
- const CodecMime *mime = ff_id3v2_mime_tags;
- AVDictionaryEntry *e;
- const char *mimetype = NULL, *desc = "";
- const AVStream *st = s->streams[pkt->stream_index];
- int i, mimelen, desclen, type = 0, blocklen;
-
- if (!pkt->data)
- return 0;
-
- while (mime->id != AV_CODEC_ID_NONE) {
- if (mime->id == st->codecpar->codec_id) {
- mimetype = mime->str;
- break;
- }
- mime++;
- }
- if (!mimetype) {
- av_log(s, AV_LOG_ERROR, "No mimetype is known for stream %d, cannot "
- "write an attached picture.\n", st->index);
- return AVERROR(EINVAL);
- }
- mimelen = strlen(mimetype);
-
- /* get the picture type */
- e = av_dict_get(st->metadata, "comment", NULL, 0);
- for (i = 0; e && i < FF_ARRAY_ELEMS(ff_id3v2_picture_types); i++) {
- if (!av_strcasecmp(e->value, ff_id3v2_picture_types[i])) {
- type = i;
- break;
- }
- }
-
- if ((c->attached_types & (1 << type)) & 0x6) {
- av_log(s, AV_LOG_ERROR, "Duplicate attachment for type '%s'\n", ff_id3v2_picture_types[type]);
- return AVERROR(EINVAL);
- }
-
- if (type == 1 && (st->codecpar->codec_id != AV_CODEC_ID_PNG ||
- st->codecpar->width != 32 ||
- st->codecpar->height != 32)) {
- av_log(s, AV_LOG_ERROR, "File icon attachment must be a 32x32 PNG");
- return AVERROR(EINVAL);
- }
-
- c->attached_types |= (1 << type);
-
- /* get the description */
- if ((e = av_dict_get(st->metadata, "title", NULL, 0)))
- desc = e->value;
- desclen = strlen(desc);
-
- blocklen = 4 + 4 + mimelen + 4 + desclen + 4 + 4 + 4 + 4 + 4 + pkt->size;
- if (blocklen >= 1<<24) {
- av_log(s, AV_LOG_ERROR, "Picture block too big %d >= %d\n", blocklen, 1<<24);
- return AVERROR(EINVAL);
- }
-
- avio_w8(pb, 0x06);
- avio_wb24(pb, blocklen);
-
- avio_wb32(pb, type);
-
- avio_wb32(pb, mimelen);
- avio_write(pb, mimetype, mimelen);
-
- avio_wb32(pb, desclen);
- avio_write(pb, desc, desclen);
-
- avio_wb32(pb, st->codecpar->width);
- avio_wb32(pb, st->codecpar->height);
- if ((pixdesc = av_pix_fmt_desc_get(st->codecpar->format)))
- avio_wb32(pb, av_get_bits_per_pixel(pixdesc));
- else
- avio_wb32(pb, 0);
- avio_wb32(pb, 0);
-
- avio_wb32(pb, pkt->size);
- avio_write(pb, pkt->data, pkt->size);
- return 0;
-}
-
static int flac_finish_header(struct AVFormatContext *s)
{
+ FlacMuxerContext *c = s->priv_data;
int i, ret, padding = s->metadata_header_padding;
if (padding < 0)
padding = 8192;
@@ -179,7 +95,7 @@ static int flac_finish_header(struct AVFormatContext *s)
AVPacket *pkt = st->priv_data;
if (!pkt)
continue;
- ret = flac_write_picture(s, pkt);
+ ret = ff_flac_write_picture(s, 0, &c->attached_types, -1, pkt);
av_packet_unref(pkt);
if (ret < 0 && (s->error_recognition & AV_EF_EXPLODE))
return ret;
--
2.34.1