* Interface to libfaac for aac encoding
* Copyright (c) 2002 Gildas Bazin <gbazin@netcourrier.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
*/
* Interface to libfaac for aac encoding.
*/
-#include "avcodec.h"
#include <faac.h>
+#include "libavutil/channel_layout.h"
+#include "libavutil/common.h"
+#include "avcodec.h"
+#include "audio_frame_queue.h"
+#include "internal.h"
+
+
+/* libfaac has an encoder delay of 1024 samples */
+#define FAAC_DELAY_SAMPLES 1024
+
typedef struct FaacAudioContext {
faacEncHandle faac_handle;
+ AudioFrameQueue afq;
} FaacAudioContext;
+
+static av_cold int Faac_encode_close(AVCodecContext *avctx)
+{
+ FaacAudioContext *s = avctx->priv_data;
+
+ av_freep(&avctx->extradata);
+ ff_af_queue_close(&s->afq);
+
+ if (s->faac_handle)
+ faacEncClose(s->faac_handle);
+
+ return 0;
+}
+
+static const int channel_maps[][6] = {
+ { 2, 0, 1 }, //< C L R
+ { 2, 0, 1, 3 }, //< C L R Cs
+ { 2, 0, 1, 3, 4 }, //< C L R Ls Rs
+ { 2, 0, 1, 4, 5, 3 }, //< C L R Ls Rs LFE
+};
+
static av_cold int Faac_encode_init(AVCodecContext *avctx)
{
FaacAudioContext *s = avctx->priv_data;
faacEncConfigurationPtr faac_cfg;
unsigned long samples_input, max_bytes_output;
+ int ret;
/* number of channels */
if (avctx->channels < 1 || avctx->channels > 6) {
av_log(avctx, AV_LOG_ERROR, "encoding %d channel(s) is not allowed\n", avctx->channels);
- return -1;
+ ret = AVERROR(EINVAL);
+ goto error;
}
s->faac_handle = faacEncOpen(avctx->sample_rate,
avctx->channels,
&samples_input, &max_bytes_output);
+ if (!s->faac_handle) {
+ av_log(avctx, AV_LOG_ERROR, "error in faacEncOpen()\n");
+ ret = AVERROR_UNKNOWN;
+ goto error;
+ }
/* check faac version */
faac_cfg = faacEncGetCurrentConfiguration(s->faac_handle);
if (faac_cfg->version != FAAC_CFG_VERSION) {
av_log(avctx, AV_LOG_ERROR, "wrong libfaac version (compiled for: %d, using %d)\n", FAAC_CFG_VERSION, faac_cfg->version);
- faacEncClose(s->faac_handle);
- return -1;
+ ret = AVERROR(EINVAL);
+ goto error;
}
/* put the options in the configuration struct */
break;
default:
av_log(avctx, AV_LOG_ERROR, "invalid AAC profile\n");
- faacEncClose(s->faac_handle);
- return -1;
+ ret = AVERROR(EINVAL);
+ goto error;
}
faac_cfg->mpegVersion = MPEG4;
faac_cfg->useTns = 0;
faac_cfg->allowMidside = 1;
faac_cfg->bitRate = avctx->bit_rate / avctx->channels;
faac_cfg->bandWidth = avctx->cutoff;
- if(avctx->flags & CODEC_FLAG_QSCALE) {
+ if(avctx->flags & AV_CODEC_FLAG_QSCALE) {
faac_cfg->bitRate = 0;
faac_cfg->quantqual = avctx->global_quality / FF_QP2LAMBDA;
}
faac_cfg->outputFormat = 1;
faac_cfg->inputFormat = FAAC_INPUT_16BIT;
+ if (avctx->channels > 2)
+ memcpy(faac_cfg->channel_map, channel_maps[avctx->channels-3],
+ avctx->channels * sizeof(int));
avctx->frame_size = samples_input / avctx->channels;
- avctx->coded_frame= avcodec_alloc_frame();
- avctx->coded_frame->key_frame= 1;
-
/* Set decoder specific info */
avctx->extradata_size = 0;
- if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
+ if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
unsigned char *buffer = NULL;
unsigned long decoder_specific_info_size;
if (!faacEncGetDecoderSpecificInfo(s->faac_handle, &buffer,
&decoder_specific_info_size)) {
- avctx->extradata = av_malloc(decoder_specific_info_size + FF_INPUT_BUFFER_PADDING_SIZE);
+ avctx->extradata = av_malloc(decoder_specific_info_size + AV_INPUT_BUFFER_PADDING_SIZE);
+ if (!avctx->extradata) {
+ ret = AVERROR(ENOMEM);
+ goto error;
+ }
avctx->extradata_size = decoder_specific_info_size;
memcpy(avctx->extradata, buffer, avctx->extradata_size);
faac_cfg->outputFormat = 0;
}
-#undef free
free(buffer);
-#define free please_use_av_free
}
if (!faacEncSetConfiguration(s->faac_handle, faac_cfg)) {
av_log(avctx, AV_LOG_ERROR, "libfaac doesn't support this output format!\n");
- return -1;
+ ret = AVERROR(EINVAL);
+ goto error;
}
+ avctx->initial_padding = FAAC_DELAY_SAMPLES;
+ ff_af_queue_init(avctx, &s->afq);
+
return 0;
+error:
+ Faac_encode_close(avctx);
+ return ret;
}
-static int Faac_encode_frame(AVCodecContext *avctx,
- unsigned char *frame, int buf_size, void *data)
+static int Faac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
+ const AVFrame *frame, int *got_packet_ptr)
{
FaacAudioContext *s = avctx->priv_data;
- int bytes_written;
+ int bytes_written, ret;
+ int num_samples = frame ? frame->nb_samples : 0;
+ void *samples = frame ? frame->data[0] : NULL;
- bytes_written = faacEncEncode(s->faac_handle,
- data,
- avctx->frame_size * avctx->channels,
- frame,
- buf_size);
+ if ((ret = ff_alloc_packet(avpkt, (7 + 768) * avctx->channels))) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
+ return ret;
+ }
- return bytes_written;
-}
+ bytes_written = faacEncEncode(s->faac_handle, samples,
+ num_samples * avctx->channels,
+ avpkt->data, avpkt->size);
+ if (bytes_written < 0) {
+ av_log(avctx, AV_LOG_ERROR, "faacEncEncode() error\n");
+ return bytes_written;
+ }
-static av_cold int Faac_encode_close(AVCodecContext *avctx)
-{
- FaacAudioContext *s = avctx->priv_data;
+ /* add current frame to the queue */
+ if (frame) {
+ if ((ret = ff_af_queue_add(&s->afq, frame)) < 0)
+ return ret;
+ }
- av_freep(&avctx->coded_frame);
- av_freep(&avctx->extradata);
+ if (!bytes_written)
+ return 0;
+
+ /* Get the next frame pts/duration */
+ ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
+ &avpkt->duration);
- faacEncClose(s->faac_handle);
+ avpkt->size = bytes_written;
+ *got_packet_ptr = 1;
return 0;
}
-AVCodec libfaac_encoder = {
- "libfaac",
- AVMEDIA_TYPE_AUDIO,
- CODEC_ID_AAC,
- sizeof(FaacAudioContext),
- Faac_encode_init,
- Faac_encode_frame,
- Faac_encode_close,
- .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
- .long_name = NULL_IF_CONFIG_SMALL("libfaac AAC (Advanced Audio Codec)"),
+static const AVProfile profiles[] = {
+ { FF_PROFILE_AAC_MAIN, "Main" },
+ { FF_PROFILE_AAC_LOW, "LC" },
+ { FF_PROFILE_AAC_SSR, "SSR" },
+ { FF_PROFILE_AAC_LTP, "LTP" },
+ { FF_PROFILE_UNKNOWN },
+};
+
+static const uint64_t faac_channel_layouts[] = {
+ AV_CH_LAYOUT_MONO,
+ AV_CH_LAYOUT_STEREO,
+ AV_CH_LAYOUT_SURROUND,
+ AV_CH_LAYOUT_4POINT0,
+ AV_CH_LAYOUT_5POINT0_BACK,
+ AV_CH_LAYOUT_5POINT1_BACK,
+ 0
+};
+
+AVCodec ff_libfaac_encoder = {
+ .name = "libfaac",
+ .long_name = NULL_IF_CONFIG_SMALL("libfaac AAC (Advanced Audio Coding)"),
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_AAC,
+ .priv_data_size = sizeof(FaacAudioContext),
+ .init = Faac_encode_init,
+ .encode2 = Faac_encode_frame,
+ .close = Faac_encode_close,
+ .capabilities = AV_CODEC_CAP_SMALL_LAST_FRAME | AV_CODEC_CAP_DELAY,
+ .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
+ AV_SAMPLE_FMT_NONE },
+ .profiles = NULL_IF_CONFIG_SMALL(profiles),
+ .channel_layouts = faac_channel_layouts,
};
projects / ffmpeg / blobdiff