[deb_ffmpeg.git] / ffmpeg / libavcodec / libfdk-aacdec.c

/*
 * AAC decoder 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/aacdecoder_lib.h>

#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "internal.h"

enum ConcealMethod {
    CONCEAL_METHOD_SPECTRAL_MUTING      =  0,
    CONCEAL_METHOD_NOISE_SUBSTITUTION   =  1,
    CONCEAL_METHOD_ENERGY_INTERPOLATION =  2,
    CONCEAL_METHOD_NB,
};

typedef struct FDKAACDecContext {
    const AVClass *class;
    HANDLE_AACDECODER handle;
    int initialized;
    enum ConcealMethod conceal_method;
} FDKAACDecContext;

#define OFFSET(x) offsetof(FDKAACDecContext, x)
#define AD AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM
static const AVOption fdk_aac_dec_options[] = {
    { "conceal", "Error concealment method", OFFSET(conceal_method), AV_OPT_TYPE_INT, { .i64 = CONCEAL_METHOD_NOISE_SUBSTITUTION }, CONCEAL_METHOD_SPECTRAL_MUTING, CONCEAL_METHOD_NB - 1, AD, "conceal" },
    { "spectral", "Spectral muting",      0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_SPECTRAL_MUTING },      INT_MIN, INT_MAX, AD, "conceal" },
    { "noise",    "Noise Substitution",   0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_NOISE_SUBSTITUTION },   INT_MIN, INT_MAX, AD, "conceal" },
    { "energy",   "Energy Interpolation", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_ENERGY_INTERPOLATION }, INT_MIN, INT_MAX, AD, "conceal" },
    { NULL }
};

static const AVClass fdk_aac_dec_class = {
    "libfdk-aac decoder", av_default_item_name, fdk_aac_dec_options, LIBAVUTIL_VERSION_INT
};

static int get_stream_info(AVCodecContext *avctx)
{
    FDKAACDecContext *s   = avctx->priv_data;
    CStreamInfo *info     = aacDecoder_GetStreamInfo(s->handle);
    int channel_counts[9] = { 0 };
    int i, ch_error       = 0;
    uint64_t ch_layout    = 0;

    if (!info) {
        av_log(avctx, AV_LOG_ERROR, "Unable to get stream info\n");
        return AVERROR_UNKNOWN;
    }

    if (info->sampleRate <= 0) {
        av_log(avctx, AV_LOG_ERROR, "Stream info not initialized\n");
        return AVERROR_UNKNOWN;
    }
    avctx->sample_rate = info->sampleRate;
    avctx->frame_size  = info->frameSize;

    for (i = 0; i < info->numChannels; i++) {
        AUDIO_CHANNEL_TYPE ctype = info->pChannelType[i];
        if (ctype <= ACT_NONE || ctype > ACT_TOP) {
            av_log(avctx, AV_LOG_WARNING, "unknown channel type\n");
            break;
        }
        channel_counts[ctype]++;
    }
    av_log(avctx, AV_LOG_DEBUG,
           "%d channels - front:%d side:%d back:%d lfe:%d top:%d\n",
           info->numChannels,
           channel_counts[ACT_FRONT], channel_counts[ACT_SIDE],
           channel_counts[ACT_BACK],  channel_counts[ACT_LFE],
           channel_counts[ACT_FRONT_TOP] + channel_counts[ACT_SIDE_TOP] +
           channel_counts[ACT_BACK_TOP]  + channel_counts[ACT_TOP]);

    switch (channel_counts[ACT_FRONT]) {
    case 4:
        ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_LEFT_OF_CENTER |
                     AV_CH_FRONT_RIGHT_OF_CENTER;
        break;
    case 3:
        ch_layout |= AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER;
        break;
    case 2:
        ch_layout |= AV_CH_LAYOUT_STEREO;
        break;
    case 1:
        ch_layout |= AV_CH_FRONT_CENTER;
        break;
    default:
        av_log(avctx, AV_LOG_WARNING,
               "unsupported number of front channels: %d\n",
               channel_counts[ACT_FRONT]);
        ch_error = 1;
        break;
    }
    if (channel_counts[ACT_SIDE] > 0) {
        if (channel_counts[ACT_SIDE] == 2) {
            ch_layout |= AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT;
        } else {
            av_log(avctx, AV_LOG_WARNING,
                   "unsupported number of side channels: %d\n",
                   channel_counts[ACT_SIDE]);
            ch_error = 1;
        }
    }
    if (channel_counts[ACT_BACK] > 0) {
        switch (channel_counts[ACT_BACK]) {
        case 3:
            ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | AV_CH_BACK_CENTER;
            break;
        case 2:
            ch_layout |= AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT;
            break;
        case 1:
            ch_layout |= AV_CH_BACK_CENTER;
            break;
        default:
            av_log(avctx, AV_LOG_WARNING,
                   "unsupported number of back channels: %d\n",
                   channel_counts[ACT_BACK]);
            ch_error = 1;
            break;
        }
    }
    if (channel_counts[ACT_LFE] > 0) {
        if (channel_counts[ACT_LFE] == 1) {
            ch_layout |= AV_CH_LOW_FREQUENCY;
        } else {
            av_log(avctx, AV_LOG_WARNING,
                   "unsupported number of LFE channels: %d\n",
                   channel_counts[ACT_LFE]);
            ch_error = 1;
        }
    }
    if (!ch_error &&
        av_get_channel_layout_nb_channels(ch_layout) != info->numChannels) {
        av_log(avctx, AV_LOG_WARNING, "unsupported channel configuration\n");
        ch_error = 1;
    }
    if (ch_error)
        avctx->channel_layout = 0;
    else
        avctx->channel_layout = ch_layout;

    avctx->channels = info->numChannels;

    return 0;
}

static av_cold int fdk_aac_decode_close(AVCodecContext *avctx)
{
    FDKAACDecContext *s = avctx->priv_data;

    if (s->handle)
        aacDecoder_Close(s->handle);

    return 0;
}

static av_cold int fdk_aac_decode_init(AVCodecContext *avctx)
{
    FDKAACDecContext *s = avctx->priv_data;
    AAC_DECODER_ERROR err;

    s->handle = aacDecoder_Open(avctx->extradata_size ? TT_MP4_RAW : TT_MP4_ADTS, 1);
    if (!s->handle) {
        av_log(avctx, AV_LOG_ERROR, "Error opening decoder\n");
        return AVERROR_UNKNOWN;
    }

    if (avctx->extradata_size) {
        if ((err = aacDecoder_ConfigRaw(s->handle, &avctx->extradata,
                                        &avctx->extradata_size)) != AAC_DEC_OK) {
            av_log(avctx, AV_LOG_ERROR, "Unable to set extradata\n");
            return AVERROR_INVALIDDATA;
        }
    }

    if ((err = aacDecoder_SetParam(s->handle, AAC_CONCEAL_METHOD,
                                   s->conceal_method)) != AAC_DEC_OK) {
        av_log(avctx, AV_LOG_ERROR, "Unable to set error concealment method\n");
        return AVERROR_UNKNOWN;
    }

    avctx->sample_fmt = AV_SAMPLE_FMT_S16;

    return 0;
}

static int fdk_aac_decode_frame(AVCodecContext *avctx, void *data,
                                int *got_frame_ptr, AVPacket *avpkt)
{
    FDKAACDecContext *s = avctx->priv_data;
    AVFrame *frame = data;
    int ret;
    AAC_DECODER_ERROR err;
    UINT valid = avpkt->size;
    uint8_t *buf, *tmpptr = NULL;
    int buf_size;

    err = aacDecoder_Fill(s->handle, &avpkt->data, &avpkt->size, &valid);
    if (err != AAC_DEC_OK) {
        av_log(avctx, AV_LOG_ERROR, "aacDecoder_Fill() failed: %x\n", err);
        return AVERROR_INVALIDDATA;
    }

    if (s->initialized) {
        frame->nb_samples = avctx->frame_size;
        if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
            return ret;
        buf = frame->extended_data[0];
        buf_size = avctx->channels * frame->nb_samples *
                   av_get_bytes_per_sample(avctx->sample_fmt);
    } else {
        buf_size = 50 * 1024;
        buf = tmpptr = av_malloc(buf_size);
        if (!buf)
            return AVERROR(ENOMEM);
    }

    err = aacDecoder_DecodeFrame(s->handle, (INT_PCM *) buf, buf_size, 0);
    if (err == AAC_DEC_NOT_ENOUGH_BITS) {
        ret = avpkt->size - valid;
        goto end;
    }
    if (err != AAC_DEC_OK) {
        av_log(avctx, AV_LOG_ERROR,
               "aacDecoder_DecodeFrame() failed: %x\n", err);
        ret = AVERROR_UNKNOWN;
        goto end;
    }

    if (!s->initialized) {
        if ((ret = get_stream_info(avctx)) < 0)
            goto end;
        s->initialized = 1;
        frame->nb_samples = avctx->frame_size;
    }

    if (tmpptr) {
        frame->nb_samples = avctx->frame_size;
        if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
            goto end;
        memcpy(frame->extended_data[0], tmpptr,
               avctx->channels * avctx->frame_size *
               av_get_bytes_per_sample(avctx->sample_fmt));
    }

    *got_frame_ptr = 1;
    ret = avpkt->size - valid;

end:
    av_free(tmpptr);
    return ret;
}

static av_cold void fdk_aac_decode_flush(AVCodecContext *avctx)
{
    FDKAACDecContext *s = avctx->priv_data;
    AAC_DECODER_ERROR err;

    if (!s->handle)
        return;

    if ((err = aacDecoder_SetParam(s->handle,
                                   AAC_TPDEC_CLEAR_BUFFER, 1)) != AAC_DEC_OK)
        av_log(avctx, AV_LOG_WARNING, "failed to clear buffer when flushing\n");
}

AVCodec ff_libfdk_aac_decoder = {
    .name           = "libfdk_aac",
    .long_name      = NULL_IF_CONFIG_SMALL("Fraunhofer FDK AAC"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_AAC,
    .priv_data_size = sizeof(FDKAACDecContext),
    .init           = fdk_aac_decode_init,
    .decode         = fdk_aac_decode_frame,
    .close          = fdk_aac_decode_close,
    .flush          = fdk_aac_decode_flush,
    .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_CHANNEL_CONF,
    .priv_class     = &fdk_aac_dec_class,
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* AAC decoder wrapper
	3	* Copyright (c) 2012 Martin Storsjo
	4	*
	5	* This file is part of FFmpeg.
	6	*
	7	* Permission to use, copy, modify, and/or distribute this software for any
	8	* purpose with or without fee is hereby granted, provided that the above
	9	* copyright notice and this permission notice appear in all copies.
	10	*
	11	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	12	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	13	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	14	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	15	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	16	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	17	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	18	*/
	19
	20	#include <fdk-aac/aacdecoder_lib.h>
	21
	22	#include "libavutil/channel_layout.h"
	23	#include "libavutil/common.h"
	24	#include "libavutil/opt.h"
	25	#include "avcodec.h"
	26	#include "internal.h"
	27
	28	enum ConcealMethod {
	29	CONCEAL_METHOD_SPECTRAL_MUTING = 0,
	30	CONCEAL_METHOD_NOISE_SUBSTITUTION = 1,
	31	CONCEAL_METHOD_ENERGY_INTERPOLATION = 2,
	32	CONCEAL_METHOD_NB,
	33	};
	34
	35	typedef struct FDKAACDecContext {
	36	const AVClass *class;
	37	HANDLE_AACDECODER handle;
	38	int initialized;
	39	enum ConcealMethod conceal_method;
	40	} FDKAACDecContext;
	41
	42	#define OFFSET(x) offsetof(FDKAACDecContext, x)
	43	#define AD AV_OPT_FLAG_AUDIO_PARAM \| AV_OPT_FLAG_DECODING_PARAM
	44	static const AVOption fdk_aac_dec_options[] = {
	45	{ "conceal", "Error concealment method", OFFSET(conceal_method), AV_OPT_TYPE_INT, { .i64 = CONCEAL_METHOD_NOISE_SUBSTITUTION }, CONCEAL_METHOD_SPECTRAL_MUTING, CONCEAL_METHOD_NB - 1, AD, "conceal" },
	46	{ "spectral", "Spectral muting", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_SPECTRAL_MUTING }, INT_MIN, INT_MAX, AD, "conceal" },
	47	{ "noise", "Noise Substitution", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_NOISE_SUBSTITUTION }, INT_MIN, INT_MAX, AD, "conceal" },
	48	{ "energy", "Energy Interpolation", 0, AV_OPT_TYPE_CONST, { .i64 = CONCEAL_METHOD_ENERGY_INTERPOLATION }, INT_MIN, INT_MAX, AD, "conceal" },
	49	{ NULL }
	50	};
	51
	52	static const AVClass fdk_aac_dec_class = {
	53	"libfdk-aac decoder", av_default_item_name, fdk_aac_dec_options, LIBAVUTIL_VERSION_INT
	54	};
	55
	56	static int get_stream_info(AVCodecContext *avctx)
	57	{
	58	FDKAACDecContext *s = avctx->priv_data;
	59	CStreamInfo *info = aacDecoder_GetStreamInfo(s->handle);
	60	int channel_counts[9] = { 0 };
	61	int i, ch_error = 0;
	62	uint64_t ch_layout = 0;
	63
	64	if (!info) {
65	av_log(avctx, AV_LOG_ERROR, "Unable to get stream info\n");
66	return AVERROR_UNKNOWN;
67	}
68
69	if (info->sampleRate <= 0) {
70	av_log(avctx, AV_LOG_ERROR, "Stream info not initialized\n");
71	return AVERROR_UNKNOWN;
72	}
73	avctx->sample_rate = info->sampleRate;
74	avctx->frame_size = info->frameSize;
75
76	for (i = 0; i < info->numChannels; i++) {
77	AUDIO_CHANNEL_TYPE ctype = info->pChannelType[i];
78	if (ctype <= ACT_NONE \|\| ctype > ACT_TOP) {
79	av_log(avctx, AV_LOG_WARNING, "unknown channel type\n");
80	break;
81	}
82	channel_counts[ctype]++;
83	}
84	av_log(avctx, AV_LOG_DEBUG,
85	"%d channels - front:%d side:%d back:%d lfe:%d top:%d\n",
86	info->numChannels,
87	channel_counts[ACT_FRONT], channel_counts[ACT_SIDE],
88	channel_counts[ACT_BACK], channel_counts[ACT_LFE],
89	channel_counts[ACT_FRONT_TOP] + channel_counts[ACT_SIDE_TOP] +
90	channel_counts[ACT_BACK_TOP] + channel_counts[ACT_TOP]);
91
92	switch (channel_counts[ACT_FRONT]) {
93	case 4:
94	ch_layout \|= AV_CH_LAYOUT_STEREO \| AV_CH_FRONT_LEFT_OF_CENTER \|
95	AV_CH_FRONT_RIGHT_OF_CENTER;
96	break;
97	case 3:
98	ch_layout \|= AV_CH_LAYOUT_STEREO \| AV_CH_FRONT_CENTER;
99	break;
100	case 2:
101	ch_layout \|= AV_CH_LAYOUT_STEREO;
102	break;
103	case 1:
104	ch_layout \|= AV_CH_FRONT_CENTER;
105	break;
106	default:
107	av_log(avctx, AV_LOG_WARNING,
108	"unsupported number of front channels: %d\n",
109	channel_counts[ACT_FRONT]);
110	ch_error = 1;
111	break;
112	}
113	if (channel_counts[ACT_SIDE] > 0) {
114	if (channel_counts[ACT_SIDE] == 2) {
115	ch_layout \|= AV_CH_SIDE_LEFT \| AV_CH_SIDE_RIGHT;
116	} else {
117	av_log(avctx, AV_LOG_WARNING,
118	"unsupported number of side channels: %d\n",
119	channel_counts[ACT_SIDE]);
120	ch_error = 1;
121	}
122	}
123	if (channel_counts[ACT_BACK] > 0) {
124	switch (channel_counts[ACT_BACK]) {
125	case 3:
126	ch_layout \|= AV_CH_BACK_LEFT \| AV_CH_BACK_RIGHT \| AV_CH_BACK_CENTER;
127	break;
128	case 2:
129	ch_layout \|= AV_CH_BACK_LEFT \| AV_CH_BACK_RIGHT;
130	break;
131	case 1:
132	ch_layout \|= AV_CH_BACK_CENTER;
133	break;
134	default:
135	av_log(avctx, AV_LOG_WARNING,
136	"unsupported number of back channels: %d\n",
137	channel_counts[ACT_BACK]);
138	ch_error = 1;
139	break;
140	}
141	}
142	if (channel_counts[ACT_LFE] > 0) {
143	if (channel_counts[ACT_LFE] == 1) {
144	ch_layout \|= AV_CH_LOW_FREQUENCY;
145	} else {
146	av_log(avctx, AV_LOG_WARNING,
147	"unsupported number of LFE channels: %d\n",
148	channel_counts[ACT_LFE]);
149	ch_error = 1;
150	}
151	}
152	if (!ch_error &&
153	av_get_channel_layout_nb_channels(ch_layout) != info->numChannels) {
154	av_log(avctx, AV_LOG_WARNING, "unsupported channel configuration\n");
155	ch_error = 1;
156	}
157	if (ch_error)
158	avctx->channel_layout = 0;
159	else
160	avctx->channel_layout = ch_layout;
161
162	avctx->channels = info->numChannels;
163
164	return 0;
165	}
166
167	static av_cold int fdk_aac_decode_close(AVCodecContext *avctx)
168	{
169	FDKAACDecContext *s = avctx->priv_data;
170
171	if (s->handle)
172	aacDecoder_Close(s->handle);
173
174	return 0;
175	}
176
177	static av_cold int fdk_aac_decode_init(AVCodecContext *avctx)
178	{
179	FDKAACDecContext *s = avctx->priv_data;
180	AAC_DECODER_ERROR err;
181
182	s->handle = aacDecoder_Open(avctx->extradata_size ? TT_MP4_RAW : TT_MP4_ADTS, 1);
183	if (!s->handle) {
184	av_log(avctx, AV_LOG_ERROR, "Error opening decoder\n");
185	return AVERROR_UNKNOWN;
186	}
187
188	if (avctx->extradata_size) {
189	if ((err = aacDecoder_ConfigRaw(s->handle, &avctx->extradata,
190	&avctx->extradata_size)) != AAC_DEC_OK) {
191	av_log(avctx, AV_LOG_ERROR, "Unable to set extradata\n");
192	return AVERROR_INVALIDDATA;
193	}
194	}
195
196	if ((err = aacDecoder_SetParam(s->handle, AAC_CONCEAL_METHOD,
197	s->conceal_method)) != AAC_DEC_OK) {
198	av_log(avctx, AV_LOG_ERROR, "Unable to set error concealment method\n");
199	return AVERROR_UNKNOWN;
200	}
201
202	avctx->sample_fmt = AV_SAMPLE_FMT_S16;
203
204	return 0;
205	}
206
207	static int fdk_aac_decode_frame(AVCodecContext avctx, void data,
208	int got_frame_ptr, AVPacket avpkt)
209	{
210	FDKAACDecContext *s = avctx->priv_data;
211	AVFrame *frame = data;
212	int ret;
213	AAC_DECODER_ERROR err;
214	UINT valid = avpkt->size;
215	uint8_t buf, tmpptr = NULL;
216	int buf_size;
217
218	err = aacDecoder_Fill(s->handle, &avpkt->data, &avpkt->size, &valid);
219	if (err != AAC_DEC_OK) {
220	av_log(avctx, AV_LOG_ERROR, "aacDecoder_Fill() failed: %x\n", err);
221	return AVERROR_INVALIDDATA;
222	}
223
224	if (s->initialized) {
225	frame->nb_samples = avctx->frame_size;
226	if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
227	return ret;
228	buf = frame->extended_data[0];
229	buf_size = avctx->channels * frame->nb_samples *
230	av_get_bytes_per_sample(avctx->sample_fmt);
231	} else {
232	buf_size = 50 * 1024;
233	buf = tmpptr = av_malloc(buf_size);
234	if (!buf)
235	return AVERROR(ENOMEM);
236	}
237
238	err = aacDecoder_DecodeFrame(s->handle, (INT_PCM *) buf, buf_size, 0);
239	if (err == AAC_DEC_NOT_ENOUGH_BITS) {
240	ret = avpkt->size - valid;
241	goto end;
242	}
243	if (err != AAC_DEC_OK) {
244	av_log(avctx, AV_LOG_ERROR,
245	"aacDecoder_DecodeFrame() failed: %x\n", err);
246	ret = AVERROR_UNKNOWN;
247	goto end;
248	}
249
250	if (!s->initialized) {
251	if ((ret = get_stream_info(avctx)) < 0)
252	goto end;
253	s->initialized = 1;
254	frame->nb_samples = avctx->frame_size;
255	}
256
257	if (tmpptr) {
258	frame->nb_samples = avctx->frame_size;
259	if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
260	goto end;
261	memcpy(frame->extended_data[0], tmpptr,
262	avctx->channels * avctx->frame_size *
263	av_get_bytes_per_sample(avctx->sample_fmt));
264	}
265
266	*got_frame_ptr = 1;
267	ret = avpkt->size - valid;
268
269	end:
270	av_free(tmpptr);
271	return ret;
272	}
273
274	static av_cold void fdk_aac_decode_flush(AVCodecContext *avctx)
275	{
276	FDKAACDecContext *s = avctx->priv_data;
277	AAC_DECODER_ERROR err;
278
279	if (!s->handle)
280	return;
281
282	if ((err = aacDecoder_SetParam(s->handle,
283	AAC_TPDEC_CLEAR_BUFFER, 1)) != AAC_DEC_OK)
284	av_log(avctx, AV_LOG_WARNING, "failed to clear buffer when flushing\n");
285	}
286
287	AVCodec ff_libfdk_aac_decoder = {
288	.name = "libfdk_aac",
289	.long_name = NULL_IF_CONFIG_SMALL("Fraunhofer FDK AAC"),
290	.type = AVMEDIA_TYPE_AUDIO,
291	.id = AV_CODEC_ID_AAC,
292	.priv_data_size = sizeof(FDKAACDecContext),
293	.init = fdk_aac_decode_init,
294	.decode = fdk_aac_decode_frame,
295	.close = fdk_aac_decode_close,
296	.flush = fdk_aac_decode_flush,
297	.capabilities = CODEC_CAP_DR1 \| CODEC_CAP_CHANNEL_CONF,
298	.priv_class = &fdk_aac_dec_class,
299	};