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Diffstat (limited to 'ffmpeg1/libavformat/adtsenc.c')
-rw-r--r--ffmpeg1/libavformat/adtsenc.c176
1 files changed, 0 insertions, 176 deletions
diff --git a/ffmpeg1/libavformat/adtsenc.c b/ffmpeg1/libavformat/adtsenc.c
deleted file mode 100644
index 14c72a8..0000000
--- a/ffmpeg1/libavformat/adtsenc.c
+++ /dev/null
@@ -1,176 +0,0 @@
-/*
- * ADTS muxer.
- * Copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@smartjog.com>
- * Mans Rullgard <mans@mansr.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 "libavcodec/get_bits.h"
-#include "libavcodec/put_bits.h"
-#include "libavcodec/avcodec.h"
-#include "libavcodec/mpeg4audio.h"
-#include "avformat.h"
-
-#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;
- MPEG4AudioConfig m4ac;
- int off;
-
- init_get_bits(&gb, buf, size * 8);
- off = avpriv_mpeg4audio_get_config(&m4ac, buf, size * 8, 1);
- if (off < 0)
- return off;
- skip_bits_long(&gb, off);
- adts->objecttype = m4ac.object_type - 1;
- adts->sample_rate_index = m4ac.sampling_index;
- adts->channel_conf = m4ac.chan_config;
-
- 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;
- }
- if (adts->sample_rate_index == 15) {
- av_log(s, AV_LOG_ERROR, "Escape sample rate index illegal in ADTS\n");
- return -1;
- }
- if (get_bits(&gb, 1)) {
- av_log(s, AV_LOG_ERROR, "960/120 MDCT window is not allowed in ADTS\n");
- return -1;
- }
- if (get_bits(&gb, 1)) {
- av_log(s, AV_LOG_ERROR, "Scalable configurations are not allowed in ADTS\n");
- return -1;
- }
- if (get_bits(&gb, 1)) {
- av_log(s, AV_LOG_ERROR, "Extension flag is not allowed in ADTS\n");
- return -1;
- }
- if (!adts->channel_conf) {
- init_put_bits(&pb, adts->pce_data, MAX_PCE_SIZE);
-
- put_bits(&pb, 3, 5); //ID_PCE
- adts->pce_size = (avpriv_copy_pce_data(&pb, &gb) + 3) / 8;
- flush_put_bits(&pb);
- }
-
- adts->write_adts = 1;
-
- return 0;
-}
-
-static int adts_write_header(AVFormatContext *s)
-{
- ADTSContext *adts = s->priv_data;
- AVCodecContext *avc = s->streams[0]->codec;
-
- if (avc->extradata_size > 0 &&
- adts_decode_extradata(s, adts, avc->extradata, avc->extradata_size) < 0)
- return -1;
-
- return 0;
-}
-
-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 */
- put_bits(&pb, 12, 0xfff); /* syncword */
- put_bits(&pb, 1, 0); /* ID */
- put_bits(&pb, 2, 0); /* layer */
- put_bits(&pb, 1, 1); /* protection_absent */
- put_bits(&pb, 2, ctx->objecttype); /* profile_objecttype */
- put_bits(&pb, 4, ctx->sample_rate_index);
- put_bits(&pb, 1, 0); /* private_bit */
- put_bits(&pb, 3, ctx->channel_conf); /* channel_configuration */
- put_bits(&pb, 1, 0); /* original_copy */
- put_bits(&pb, 1, 0); /* home */
-
- /* adts_variable_header */
- put_bits(&pb, 1, 0); /* copyright_identification_bit */
- put_bits(&pb, 1, 0); /* copyright_identification_start */
- 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 */
-
- flush_put_bits(&pb);
-
- return 0;
-}
-
-static int adts_write_packet(AVFormatContext *s, AVPacket *pkt)
-{
- ADTSContext *adts = s->priv_data;
- AVIOContext *pb = s->pb;
- uint8_t buf[ADTS_HEADER_SIZE];
-
- if (!pkt->size)
- return 0;
- if (adts->write_adts) {
- 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);
- adts->pce_size = 0;
- }
- }
- avio_write(pb, pkt->data, pkt->size);
- avio_flush(pb);
-
- return 0;
-}
-
-AVOutputFormat ff_adts_muxer = {
- .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,
-};
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