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ffmpeg/libavcodec/libfdk-aacenc.c

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/*
* AAC encoder wrapper
* Copyright (c) 2012 Martin Storsjo
*
* This file is part of FFmpeg.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <fdk-aac/aacenc_lib.h>
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "audio_frame_queue.h"
#include "codec_internal.h"
#include "encode.h"
#include "profiles.h"
#ifdef AACENCODER_LIB_VL0
#define FDKENC_VER_AT_LEAST(vl0, vl1) \
((AACENCODER_LIB_VL0 > vl0) || \
(AACENCODER_LIB_VL0 == vl0 && AACENCODER_LIB_VL1 >= vl1))
#else
#define FDKENC_VER_AT_LEAST(vl0, vl1) 0
#endif
typedef struct AACContext {
const AVClass *class;
HANDLE_AACENCODER handle;
int afterburner;
int eld_sbr;
int eld_v2;
int signaling;
int latm;
int header_period;
int vbr;
int drc_profile;
int drc_target_ref;
int comp_profile;
int comp_target_ref;
int prog_ref;
int metadata_mode;
AACENC_MetaData metaDataSetup;
int delay_sent;
int frame_length;
AudioFrameQueue afq;
} AACContext;
static const AVOption aac_enc_options[] = {
{ "afterburner", "Afterburner (improved quality)", offsetof(AACContext, afterburner), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
{ "eld_sbr", "Enable SBR for ELD (for SBR in other configurations, use the -profile parameter)", offsetof(AACContext, eld_sbr), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
#if FDKENC_VER_AT_LEAST(4, 0) // 4.0.0
{ "eld_v2", "Enable ELDv2 (LD-MPS extension for ELD stereo signals)", offsetof(AACContext, eld_v2), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
#endif
{ "signaling", "SBR/PS signaling style", offsetof(AACContext, signaling), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 2, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, .unit = "signaling" },
{ "default", "Choose signaling implicitly (explicit hierarchical by default, implicit if global header is disabled)", 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, 0, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, .unit = "signaling" },
{ "implicit", "Implicit backwards compatible signaling", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, .unit = "signaling" },
{ "explicit_sbr", "Explicit SBR, implicit PS signaling", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, .unit = "signaling" },
{ "explicit_hierarchical", "Explicit hierarchical signaling", 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, 0, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, .unit = "signaling" },
{ "latm", "Output LATM/LOAS encapsulated data", offsetof(AACContext, latm), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
{ "header_period", "StreamMuxConfig and PCE repetition period (in frames)", offsetof(AACContext, header_period), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 0xffff, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
{ "vbr", "VBR mode (1-5)", offsetof(AACContext, vbr), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 5, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
{ "drc_profile", "The desired compression profile for AAC DRC", offsetof(AACContext, drc_profile), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 256, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
{ "drc_target_ref", "Expected target reference level at decoder side in dB (for clipping prevention/limiter)", offsetof(AACContext, drc_target_ref), AV_OPT_TYPE_INT, { .i64 = 0.0 }, -31.75, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
{ "comp_profile", "The desired compression profile for AAC DRC", offsetof(AACContext, comp_profile), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 256, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
{ "comp_target_ref", "Expected target reference level at decoder side in dB (for clipping prevention/limiter)", offsetof(AACContext, comp_target_ref), AV_OPT_TYPE_INT, { .i64 = 0.0 }, -31.75, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
{ "prog_ref", "The program reference level or dialog level in dB", offsetof(AACContext, prog_ref), AV_OPT_TYPE_INT, { .i64 = 0.0 }, -31.75, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
{ "frame_length", "The desired frame length", offsetof(AACContext, frame_length), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1024, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
FF_AAC_PROFILE_OPTS
{ NULL }
};
static const AVClass aac_enc_class = {
.class_name = "libfdk_aac",
.item_name = av_default_item_name,
.option = aac_enc_options,
.version = LIBAVUTIL_VERSION_INT,
};
static const char *aac_get_error(AACENC_ERROR err)
{
switch (err) {
case AACENC_OK:
return "No error";
case AACENC_INVALID_HANDLE:
return "Invalid handle";
case AACENC_MEMORY_ERROR:
return "Memory allocation error";
case AACENC_UNSUPPORTED_PARAMETER:
return "Unsupported parameter";
case AACENC_INVALID_CONFIG:
return "Invalid config";
case AACENC_INIT_ERROR:
return "Initialization error";
case AACENC_INIT_AAC_ERROR:
return "AAC library initialization error";
case AACENC_INIT_SBR_ERROR:
return "SBR library initialization error";
case AACENC_INIT_TP_ERROR:
return "Transport library initialization error";
case AACENC_INIT_META_ERROR:
return "Metadata library initialization error";
case AACENC_ENCODE_ERROR:
return "Encoding error";
case AACENC_ENCODE_EOF:
return "End of file";
default:
return "Unknown error";
}
}
static int aac_encode_close(AVCodecContext *avctx)
{
AACContext *s = avctx->priv_data;
if (s->handle)
aacEncClose(&s->handle);
ff_af_queue_close(&s->afq);
return 0;
}
static void aac_encode_flush(AVCodecContext *avctx)
{
AACContext *s = avctx->priv_data;
AACENC_BufDesc in_buf = { 0 }, out_buf = { 0 };
AACENC_InArgs in_args = { 0 };
AACENC_OutArgs out_args;
int64_t pts, duration;
uint8_t dummy_in[1], dummy_out[1];
int in_buffer_identifiers[] = { IN_AUDIO_DATA, IN_METADATA_SETUP };
int in_buffer_element_sizes[] = { 2, sizeof(AACENC_MetaData) };
int in_buffer_sizes[] = { 0, sizeof(s->metaDataSetup) };
int out_buffer_identifier = OUT_BITSTREAM_DATA;
int out_buffer_size = sizeof(dummy_out), out_buffer_element_size = 1;
void* inBuffer[] = { dummy_in, &s->metaDataSetup };
void *out_ptr = dummy_out;
AACENC_ERROR err;
ff_af_queue_remove(&s->afq, s->afq.frame_count, &pts, &duration);
in_buf.bufs = (void **)inBuffer;
in_buf.numBufs = s->metadata_mode == 0 ? 1 : 2;
in_buf.bufferIdentifiers = in_buffer_identifiers;
in_buf.bufSizes = in_buffer_sizes;
in_buf.bufElSizes = in_buffer_element_sizes;
out_buf.numBufs = 1;
out_buf.bufs = &out_ptr;
out_buf.bufferIdentifiers = &out_buffer_identifier;
out_buf.bufSizes = &out_buffer_size;
out_buf.bufElSizes = &out_buffer_element_size;
err = aacEncEncode(s->handle, &in_buf, &out_buf, &in_args, &out_args);
if (err != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unexpected error while flushing: %s\n",
aac_get_error(err));
}
}
static av_cold int aac_encode_init(AVCodecContext *avctx)
{
AACContext *s = avctx->priv_data;
int ret = AVERROR(EINVAL);
AACENC_InfoStruct info = { 0 };
CHANNEL_MODE mode;
AACENC_ERROR err;
int aot = AV_PROFILE_AAC_LOW + 1;
int sce = 0, cpe = 0;
if ((err = aacEncOpen(&s->handle, 0, avctx->ch_layout.nb_channels)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to open the encoder: %s\n",
aac_get_error(err));
goto error;
}
if (avctx->profile != AV_PROFILE_UNKNOWN)
aot = avctx->profile + 1;
if ((err = aacEncoder_SetParam(s->handle, AACENC_AOT, aot)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to set the AOT %d: %s\n",
aot, aac_get_error(err));
goto error;
}
if (aot == AV_PROFILE_AAC_ELD + 1 && s->eld_sbr) {
if ((err = aacEncoder_SetParam(s->handle, AACENC_SBR_MODE,
1)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to enable SBR for ELD: %s\n",
aac_get_error(err));
goto error;
}
}
if (s->frame_length >= 0) {
if ((err = aacEncoder_SetParam(s->handle, AACENC_GRANULE_LENGTH,
s->frame_length)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to set granule length: %s\n",
aac_get_error(err));
goto error;
}
}
if ((err = aacEncoder_SetParam(s->handle, AACENC_SAMPLERATE,
avctx->sample_rate)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to set the sample rate %d: %s\n",
avctx->sample_rate, aac_get_error(err));
goto error;
}
switch (avctx->ch_layout.nb_channels) {
case 1: mode = MODE_1; sce = 1; cpe = 0; break;
case 2:
#if FDKENC_VER_AT_LEAST(4, 0) // 4.0.0
// (profile + 1) to map from profile range to AOT range
if (aot == AV_PROFILE_AAC_ELD + 1 && s->eld_v2) {
if ((err = aacEncoder_SetParam(s->handle, AACENC_CHANNELMODE,
128)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to enable ELDv2: %s\n",
aac_get_error(err));
goto error;
} else {
mode = MODE_212;
sce = 1;
cpe = 0;
}
} else
#endif
{
mode = MODE_2;
sce = 0;
cpe = 1;
}
break;
case 3: mode = MODE_1_2; sce = 1; cpe = 1; break;
case 4: mode = MODE_1_2_1; sce = 2; cpe = 1; break;
case 5: mode = MODE_1_2_2; sce = 1; cpe = 2; break;
case 6: mode = MODE_1_2_2_1; sce = 2; cpe = 2; break;
#if FDKENC_VER_AT_LEAST(4, 0) // 4.0.0
case 7: mode = MODE_6_1; sce = 3; cpe = 2; break;
#endif
/* The version macro is introduced the same time as the 7.1 support, so this
should suffice. */
#if FDKENC_VER_AT_LEAST(3, 4) // 3.4.12
case 8:
sce = 2;
cpe = 3;
if (!av_channel_layout_compare(&avctx->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_7POINT1)) {
mode = MODE_7_1_REAR_SURROUND;
#if FDKENC_VER_AT_LEAST(4, 0) // 4.0.0
} else if (!av_channel_layout_compare(&avctx->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_7POINT1_TOP_BACK)) {
mode = MODE_7_1_TOP_FRONT;
#endif
} else {
// MODE_1_2_2_2_1 and MODE_7_1_FRONT_CENTER use the same channel layout
mode = MODE_7_1_FRONT_CENTER;
}
break;
#endif
default:
av_log(avctx, AV_LOG_ERROR,
"Unsupported number of channels %d\n", avctx->ch_layout.nb_channels);
goto error;
}
if ((err = aacEncoder_SetParam(s->handle, AACENC_CHANNELMODE,
mode)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR,
"Unable to set channel mode %d: %s\n", mode, aac_get_error(err));
goto error;
}
if ((err = aacEncoder_SetParam(s->handle, AACENC_CHANNELORDER,
1)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR,
"Unable to set wav channel order %d: %s\n",
mode, aac_get_error(err));
goto error;
}
if (avctx->flags & AV_CODEC_FLAG_QSCALE || s->vbr) {
int mode = s->vbr ? s->vbr : avctx->global_quality;
if (mode < 1 || mode > 5) {
av_log(avctx, AV_LOG_WARNING,
"VBR quality %d out of range, should be 1-5\n", mode);
mode = av_clip(mode, 1, 5);
}
av_log(avctx, AV_LOG_WARNING,
"Note, the VBR setting is unsupported and only works with "
"some parameter combinations\n");
if ((err = aacEncoder_SetParam(s->handle, AACENC_BITRATEMODE,
mode)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to set the VBR bitrate mode %d: %s\n",
mode, aac_get_error(err));
goto error;
}
} else {
if (avctx->bit_rate <= 0) {
if (avctx->profile == AV_PROFILE_AAC_HE_V2) {
sce = 1;
cpe = 0;
}
avctx->bit_rate = (96*sce + 128*cpe) * avctx->sample_rate / 44;
if (avctx->profile == AV_PROFILE_AAC_HE ||
avctx->profile == AV_PROFILE_AAC_HE_V2 ||
avctx->profile == AV_PROFILE_MPEG2_AAC_HE ||
s->eld_sbr)
avctx->bit_rate /= 2;
}
if ((err = aacEncoder_SetParam(s->handle, AACENC_BITRATE,
avctx->bit_rate)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to set the bitrate %"PRId64": %s\n",
avctx->bit_rate, aac_get_error(err));
goto error;
}
}
/* Choose bitstream format - if global header is requested, use
* raw access units, otherwise use ADTS. */
if ((err = aacEncoder_SetParam(s->handle, AACENC_TRANSMUX,
avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER ? TT_MP4_RAW :
s->latm ? TT_MP4_LOAS : TT_MP4_ADTS)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to set the transmux format: %s\n",
aac_get_error(err));
goto error;
}
if (s->latm && s->header_period) {
if ((err = aacEncoder_SetParam(s->handle, AACENC_HEADER_PERIOD,
s->header_period)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to set header period: %s\n",
aac_get_error(err));
goto error;
}
}
/* If no signaling mode is chosen, use explicit hierarchical signaling
* if using mp4 mode (raw access units, with global header) and
* implicit signaling if using ADTS. */
if (s->signaling < 0)
s->signaling = avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER ? 2 : 0;
if ((err = aacEncoder_SetParam(s->handle, AACENC_SIGNALING_MODE,
s->signaling)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to set signaling mode %d: %s\n",
s->signaling, aac_get_error(err));
goto error;
}
if ((err = aacEncoder_SetParam(s->handle, AACENC_AFTERBURNER,
s->afterburner)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to set afterburner to %d: %s\n",
s->afterburner, aac_get_error(err));
goto error;
}
if (avctx->cutoff > 0) {
if (avctx->cutoff < (avctx->sample_rate + 255) >> 8 || avctx->cutoff > 20000) {
av_log(avctx, AV_LOG_ERROR, "cutoff valid range is %d-20000\n",
(avctx->sample_rate + 255) >> 8);
goto error;
}
if ((err = aacEncoder_SetParam(s->handle, AACENC_BANDWIDTH,
avctx->cutoff)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to set the encoder bandwidth to %d: %s\n",
avctx->cutoff, aac_get_error(err));
goto error;
}
}
s->metadata_mode = 0;
if (s->prog_ref) {
s->metadata_mode = 1;
s->metaDataSetup.prog_ref_level_present = 1;
s->metaDataSetup.prog_ref_level = s->prog_ref << 16;
}
if (s->drc_profile) {
s->metadata_mode = 1;
s->metaDataSetup.drc_profile = s->drc_profile;
s->metaDataSetup.drc_TargetRefLevel = s->drc_target_ref << 16;
if (s->comp_profile) {
/* Including the comp_profile means that we need to set the mode to ETSI */
s->metadata_mode = 2;
s->metaDataSetup.comp_profile = s->comp_profile;
s->metaDataSetup.comp_TargetRefLevel = s->comp_target_ref << 16;
}
}
if ((err = aacEncoder_SetParam(s->handle, AACENC_METADATA_MODE, s->metadata_mode)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to set metadata mode to %d: %s\n",
s->metadata_mode, aac_get_error(err));
goto error;
}
if ((err = aacEncEncode(s->handle, NULL, NULL, NULL, NULL)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to initialize the encoder: %s\n",
aac_get_error(err));
return AVERROR(EINVAL);
}
if ((err = aacEncInfo(s->handle, &info)) != AACENC_OK) {
av_log(avctx, AV_LOG_ERROR, "Unable to get encoder info: %s\n",
aac_get_error(err));
goto error;
}
avctx->frame_size = info.frameLength;
#if FDKENC_VER_AT_LEAST(4, 0) // 4.0.0
avctx->initial_padding = info.nDelay;
#else
avctx->initial_padding = info.encoderDelay;
#endif
ff_af_queue_init(avctx, &s->afq);
if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
avctx->extradata_size = info.confSize;
avctx->extradata = av_mallocz(avctx->extradata_size +
AV_INPUT_BUFFER_PADDING_SIZE);
if (!avctx->extradata) {
ret = AVERROR(ENOMEM);
goto error;
}
memcpy(avctx->extradata, info.confBuf, info.confSize);
}
return 0;
error:
aac_encode_close(avctx);
return ret;
}
static int aac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
const AVFrame *frame, int *got_packet_ptr)
{
AACContext *s = avctx->priv_data;
AACENC_BufDesc in_buf = { 0 }, out_buf = { 0 };
AACENC_InArgs in_args = { 0 };
AACENC_OutArgs out_args = { 0 };
void* inBuffer[] = { 0, &s->metaDataSetup };
int in_buffer_identifiers[] = { IN_AUDIO_DATA, IN_METADATA_SETUP };
int in_buffer_element_sizes[] = { 2, sizeof(AACENC_MetaData) };
int in_buffer_sizes[] = { 0, sizeof(s->metaDataSetup) };
int out_buffer_identifier = OUT_BITSTREAM_DATA;
int out_buffer_size, out_buffer_element_size;
void *out_ptr;
int ret, discard_padding;
uint8_t dummy_buf[1];
AACENC_ERROR err;
/* handle end-of-stream small frame and flushing */
if (!frame) {
/* Must be a non-null pointer, even if it's a dummy. We could use
* the address of anything else on the stack as well. */
inBuffer[0] = dummy_buf;
in_args.numInSamples = -1;
} else {
inBuffer[0] = frame->data[0];
in_buffer_sizes[0] = 2 * avctx->ch_layout.nb_channels * frame->nb_samples;
in_args.numInSamples = avctx->ch_layout.nb_channels * frame->nb_samples;
/* add current frame to the queue */
if ((ret = ff_af_queue_add(&s->afq, frame)) < 0)
return ret;
}
if (s->metadata_mode == 0) {
in_buf.numBufs = 1;
} else {
in_buf.numBufs = 2;
}
in_buf.bufs = (void**)inBuffer;
in_buf.bufferIdentifiers = in_buffer_identifiers;
in_buf.bufSizes = in_buffer_sizes;
in_buf.bufElSizes = in_buffer_element_sizes;
/* The maximum packet size is 6144 bits aka 768 bytes per channel. */
ret = ff_alloc_packet(avctx, avpkt, FFMAX(8192, 768 * avctx->ch_layout.nb_channels));
if (ret < 0)
return ret;
out_ptr = avpkt->data;
out_buffer_size = avpkt->size;
out_buffer_element_size = 1;
out_buf.numBufs = 1;
out_buf.bufs = &out_ptr;
out_buf.bufferIdentifiers = &out_buffer_identifier;
out_buf.bufSizes = &out_buffer_size;
out_buf.bufElSizes = &out_buffer_element_size;
if ((err = aacEncEncode(s->handle, &in_buf, &out_buf, &in_args,
&out_args)) != AACENC_OK) {
if (!frame && err == AACENC_ENCODE_EOF)
return 0;
av_log(avctx, AV_LOG_ERROR, "Unable to encode frame: %s\n",
aac_get_error(err));
return AVERROR(EINVAL);
}
if (!out_args.numOutBytes)
return 0;
/* Get the next frame pts & duration */
ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
&avpkt->duration);
discard_padding = avctx->frame_size - avpkt->duration;
// Check if subtraction resulted in an overflow
if ((discard_padding < avctx->frame_size) != (avpkt->duration > 0)) {
av_log(avctx, AV_LOG_ERROR, "discard padding overflow\n");
return AVERROR(EINVAL);
}
if ((!s->delay_sent && avctx->initial_padding > 0) || discard_padding > 0) {
uint8_t *side_data =
av_packet_new_side_data(avpkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
if (!side_data)
return AVERROR(ENOMEM);
if (!s->delay_sent) {
AV_WL32(side_data, avctx->initial_padding);
s->delay_sent = 1;
}
AV_WL32(side_data + 4, discard_padding);
}
avpkt->size = out_args.numOutBytes;
*got_packet_ptr = 1;
return 0;
}
static const AVProfile profiles[] = {
{ AV_PROFILE_AAC_LOW, "LC" },
{ AV_PROFILE_AAC_HE, "HE-AAC" },
{ AV_PROFILE_AAC_HE_V2, "HE-AACv2" },
{ AV_PROFILE_AAC_LD, "LD" },
{ AV_PROFILE_AAC_ELD, "ELD" },
{ AV_PROFILE_UNKNOWN },
};
static const FFCodecDefault aac_encode_defaults[] = {
{ "b", "0" },
{ NULL }
};
static const AVChannelLayout aac_ch_layouts[16] = {
AV_CHANNEL_LAYOUT_MONO,
AV_CHANNEL_LAYOUT_STEREO,
AV_CHANNEL_LAYOUT_SURROUND,
AV_CHANNEL_LAYOUT_4POINT0,
AV_CHANNEL_LAYOUT_5POINT0_BACK,
AV_CHANNEL_LAYOUT_5POINT1_BACK,
#if FDKENC_VER_AT_LEAST(4, 0) // 4.0.0
AV_CHANNEL_LAYOUT_6POINT1_BACK,
#endif
#if FDKENC_VER_AT_LEAST(3, 4) // 3.4.12
AV_CHANNEL_LAYOUT_7POINT1_WIDE_BACK,
AV_CHANNEL_LAYOUT_7POINT1,
#endif
#if FDKENC_VER_AT_LEAST(4, 0) // 4.0.0
AV_CHANNEL_LAYOUT_7POINT1_TOP_BACK,
#endif
{ 0 },
};
static const int aac_sample_rates[] = {
96000, 88200, 64000, 48000, 44100, 32000,
24000, 22050, 16000, 12000, 11025, 8000, 0
};
const FFCodec ff_libfdk_aac_encoder = {
.p.name = "libfdk_aac",
CODEC_LONG_NAME("Fraunhofer FDK AAC"),
.p.type = AVMEDIA_TYPE_AUDIO,
.p.id = AV_CODEC_ID_AAC,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
AV_CODEC_CAP_ENCODER_FLUSH |
AV_CODEC_CAP_SMALL_LAST_FRAME,
.caps_internal = FF_CODEC_CAP_NOT_INIT_THREADSAFE,
.priv_data_size = sizeof(AACContext),
.init = aac_encode_init,
FF_CODEC_ENCODE_CB(aac_encode_frame),
.flush = aac_encode_flush,
.close = aac_encode_close,
.p.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
AV_SAMPLE_FMT_NONE },
.p.priv_class = &aac_enc_class,
.defaults = aac_encode_defaults,
.p.profiles = profiles,
.p.supported_samplerates = aac_sample_rates,
.p.wrapper_name = "libfdk",
.p.ch_layouts = aac_ch_layouts,
};
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