* Copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@smartjog.com>
* Mans Rullgard <mans@mansr.com>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavcodec/avcodec.h"
#include "libavcodec/mpeg4audio.h"
#include "avformat.h"
-#include "adts.h"
-int ff_adts_decode_extradata(AVFormatContext *s, ADTSContext *adts, uint8_t *buf, int size)
+#define ADTS_HEADER_SIZE 7
+
+typedef struct {
+ int write_adts;
+ int objecttype;
+ int sample_rate_index;
+ int channel_conf;
+ int pce_size;
+ uint8_t pce_data[MAX_PCE_SIZE];
+} ADTSContext;
+
+#define ADTS_MAX_FRAME_BYTES ((1 << 13) - 1)
+
+static int adts_decode_extradata(AVFormatContext *s, ADTSContext *adts, uint8_t *buf, int size)
{
GetBitContext gb;
PutBitContext pb;
int off;
init_get_bits(&gb, buf, size * 8);
- off = ff_mpeg4audio_get_config(&m4ac, buf, size);
+ off = avpriv_mpeg4audio_get_config(&m4ac, buf, size * 8, 1);
if (off < 0)
return off;
skip_bits_long(&gb, off);
if (adts->objecttype > 3U) {
av_log(s, AV_LOG_ERROR, "MPEG-4 AOT %d is not allowed in ADTS\n", adts->objecttype+1);
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (adts->sample_rate_index == 15) {
av_log(s, AV_LOG_ERROR, "Escape sample rate index illegal in ADTS\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (get_bits(&gb, 1)) {
av_log(s, AV_LOG_ERROR, "960/120 MDCT window is not allowed in ADTS\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
if (get_bits(&gb, 1)) {
av_log(s, AV_LOG_ERROR, "Scalable configurations are not allowed in ADTS\n");
- return -1;
+ return AVERROR_INVALIDDATA;
+ }
+ if (get_bits(&gb, 1)) {
+ av_log(s, AV_LOG_ERROR, "Extension flag is not allowed in ADTS\n");
+ return AVERROR_INVALIDDATA;
}
if (!adts->channel_conf) {
init_put_bits(&pb, adts->pce_data, MAX_PCE_SIZE);
put_bits(&pb, 3, 5); //ID_PCE
- adts->pce_size = (ff_copy_pce_data(&pb, &gb) + 3) / 8;
+ adts->pce_size = (avpriv_copy_pce_data(&pb, &gb) + 3) / 8;
flush_put_bits(&pb);
}
ADTSContext *adts = s->priv_data;
AVCodecContext *avc = s->streams[0]->codec;
- if (avc->extradata_size > 0 &&
- ff_adts_decode_extradata(s, adts, avc->extradata, avc->extradata_size) < 0)
- return -1;
+ if (avc->extradata_size > 0)
+ return adts_decode_extradata(s, adts, avc->extradata,
+ avc->extradata_size);
return 0;
}
-int ff_adts_write_frame_header(ADTSContext *ctx,
- uint8_t *buf, int size, int pce_size)
+static int adts_write_frame_header(ADTSContext *ctx,
+ uint8_t *buf, int size, int pce_size)
{
PutBitContext pb;
+ unsigned full_frame_size = (unsigned)ADTS_HEADER_SIZE + size + pce_size;
+ if (full_frame_size > ADTS_MAX_FRAME_BYTES) {
+ av_log(NULL, AV_LOG_ERROR, "ADTS frame size too large: %u (max %d)\n",
+ full_frame_size, ADTS_MAX_FRAME_BYTES);
+ return AVERROR_INVALIDDATA;
+ }
+
init_put_bits(&pb, buf, ADTS_HEADER_SIZE);
/* adts_fixed_header */
/* adts_variable_header */
put_bits(&pb, 1, 0); /* copyright_identification_bit */
put_bits(&pb, 1, 0); /* copyright_identification_start */
- put_bits(&pb, 13, ADTS_HEADER_SIZE + size + pce_size); /* aac_frame_length */
+ put_bits(&pb, 13, full_frame_size); /* aac_frame_length */
put_bits(&pb, 11, 0x7ff); /* adts_buffer_fullness */
put_bits(&pb, 2, 0); /* number_of_raw_data_blocks_in_frame */
if (!pkt->size)
return 0;
if (adts->write_adts) {
- ff_adts_write_frame_header(adts, buf, pkt->size, adts->pce_size);
+ int err = adts_write_frame_header(adts, buf, pkt->size,
+ adts->pce_size);
+ if (err < 0)
+ return err;
avio_write(pb, buf, ADTS_HEADER_SIZE);
if (adts->pce_size) {
avio_write(pb, adts->pce_data, adts->pce_size);
}
}
avio_write(pb, pkt->data, pkt->size);
- put_flush_packet(pb);
return 0;
}
AVOutputFormat ff_adts_muxer = {
- "adts",
- NULL_IF_CONFIG_SMALL("ADTS AAC"),
- "audio/aac",
- "aac,adts",
- sizeof(ADTSContext),
- CODEC_ID_AAC,
- CODEC_ID_NONE,
- adts_write_header,
- adts_write_packet,
+ .name = "adts",
+ .long_name = NULL_IF_CONFIG_SMALL("ADTS AAC (Advanced Audio Coding)"),
+ .mime_type = "audio/aac",
+ .extensions = "aac,adts",
+ .priv_data_size = sizeof(ADTSContext),
+ .audio_codec = AV_CODEC_ID_AAC,
+ .video_codec = AV_CODEC_ID_NONE,
+ .write_header = adts_write_header,
+ .write_packet = adts_write_packet,
+ .flags = AVFMT_NOTIMESTAMPS,
};