[deb_ffmpeg.git] / ffmpeg / libavcodec / libfaac.c

/*
 * Interface to libfaac for aac encoding
 * Copyright (c) 2002 Gildas Bazin <gbazin@netcourrier.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
 */

/**
 * @file
 * Interface to libfaac for aac encoding.
 */

#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);
        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);
        ret = AVERROR(EINVAL);
        goto error;
    }

    /* put the options in the configuration struct */
    switch(avctx->profile) {
        case FF_PROFILE_AAC_MAIN:
            faac_cfg->aacObjectType = MAIN;
            break;
        case FF_PROFILE_UNKNOWN:
        case FF_PROFILE_AAC_LOW:
            faac_cfg->aacObjectType = LOW;
            break;
        case FF_PROFILE_AAC_SSR:
            faac_cfg->aacObjectType = SSR;
            break;
        case FF_PROFILE_AAC_LTP:
            faac_cfg->aacObjectType = LTP;
            break;
        default:
            av_log(avctx, AV_LOG_ERROR, "invalid AAC profile\n");
            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) {
        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;

    /* Set decoder specific info */
    avctx->extradata_size = 0;
    if (avctx->flags & 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);
            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;
        }
        free(buffer);
    }

    if (!faacEncSetConfiguration(s->faac_handle, faac_cfg)) {
        int i;
        for (i = avctx->bit_rate/1000; i ; i--) {
            faac_cfg->bitRate = 1000*i / avctx->channels;
            if (faacEncSetConfiguration(s->faac_handle, faac_cfg))
                break;
        }
        if (!i) {
            av_log(avctx, AV_LOG_ERROR, "libfaac doesn't support this output format!\n");
            ret = AVERROR(EINVAL);
            goto error;
        } else {
            avctx->bit_rate = 1000*i;
            av_log(avctx, AV_LOG_WARNING, "libfaac doesn't support the specified bitrate, using %dkbit/s instead\n", i);
        }
    }

    avctx->delay = 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, AVPacket *avpkt,
                             const AVFrame *frame, int *got_packet_ptr)
{
    FaacAudioContext *s = avctx->priv_data;
    int bytes_written, ret;
    int num_samples  = frame ? frame->nb_samples : 0;
    void *samples    = frame ? frame->data[0]    : NULL;

    if ((ret = ff_alloc_packet2(avctx, avpkt, (7 + 768) * avctx->channels)) < 0)
        return ret;

    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;
    }

    /* add current frame to the queue */
    if (frame) {
        if ((ret = ff_af_queue_add(&s->afq, frame)) < 0)
            return ret;
    }

    if (!bytes_written)
        return 0;

    /* Get the next frame pts/duration */
    ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
                       &avpkt->duration);

    avpkt->size = bytes_written;
    *got_packet_ptr = 1;
    return 0;
}

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   = CODEC_CAP_SMALL_LAST_FRAME | 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,
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* Interface to libfaac for aac encoding
	3	* Copyright (c) 2002 Gildas Bazin <gbazin@netcourrier.com>
	4	*
	5	* This file is part of FFmpeg.
	6	*
	7	* FFmpeg is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU Lesser General Public
	9	* License as published by the Free Software Foundation; either
	10	* version 2.1 of the License, or (at your option) any later version.
	11	*
	12	* FFmpeg is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* Lesser General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU Lesser General Public
	18	* License along with FFmpeg; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	20	*/
	21
	22	/**
	23	* @file
	24	* Interface to libfaac for aac encoding.
	25	*/
	26
	27	#include <faac.h>
	28
	29	#include "libavutil/channel_layout.h"
	30	#include "libavutil/common.h"
	31	#include "avcodec.h"
	32	#include "audio_frame_queue.h"
	33	#include "internal.h"
	34
	35
	36	/* libfaac has an encoder delay of 1024 samples */
	37	#define FAAC_DELAY_SAMPLES 1024
	38
	39	typedef struct FaacAudioContext {
	40	faacEncHandle faac_handle;
	41	AudioFrameQueue afq;
	42	} FaacAudioContext;
	43
	44	static av_cold int Faac_encode_close(AVCodecContext *avctx)
	45	{
	46	FaacAudioContext *s = avctx->priv_data;
	47
	48	av_freep(&avctx->extradata);
	49	ff_af_queue_close(&s->afq);
	50
	51	if (s->faac_handle)
	52	faacEncClose(s->faac_handle);
	53
	54	return 0;
	55	}
	56
	57	static const int channel_maps[][6] = {
	58	{ 2, 0, 1 }, //< C L R
	59	{ 2, 0, 1, 3 }, //< C L R Cs
	60	{ 2, 0, 1, 3, 4 }, //< C L R Ls Rs
	61	{ 2, 0, 1, 4, 5, 3 }, //< C L R Ls Rs LFE
	62	};
	63
	64	static av_cold int Faac_encode_init(AVCodecContext *avctx)
65	{
66	FaacAudioContext *s = avctx->priv_data;
67	faacEncConfigurationPtr faac_cfg;
68	unsigned long samples_input, max_bytes_output;
69	int ret;
70
71	/* number of channels */
72	if (avctx->channels < 1 \|\| avctx->channels > 6) {
73	av_log(avctx, AV_LOG_ERROR, "encoding %d channel(s) is not allowed\n", avctx->channels);
74	ret = AVERROR(EINVAL);
75	goto error;
76	}
77
78	s->faac_handle = faacEncOpen(avctx->sample_rate,
79	avctx->channels,
80	&samples_input, &max_bytes_output);
81	if (!s->faac_handle) {
82	av_log(avctx, AV_LOG_ERROR, "error in faacEncOpen()\n");
83	ret = AVERROR_UNKNOWN;
84	goto error;
85	}
86
87	/* check faac version */
88	faac_cfg = faacEncGetCurrentConfiguration(s->faac_handle);
89	if (faac_cfg->version != FAAC_CFG_VERSION) {
90	av_log(avctx, AV_LOG_ERROR, "wrong libfaac version (compiled for: %d, using %d)\n", FAAC_CFG_VERSION, faac_cfg->version);
91	ret = AVERROR(EINVAL);
92	goto error;
93	}
94
95	/* put the options in the configuration struct */
96	switch(avctx->profile) {
97	case FF_PROFILE_AAC_MAIN:
98	faac_cfg->aacObjectType = MAIN;
99	break;
100	case FF_PROFILE_UNKNOWN:
101	case FF_PROFILE_AAC_LOW:
102	faac_cfg->aacObjectType = LOW;
103	break;
104	case FF_PROFILE_AAC_SSR:
105	faac_cfg->aacObjectType = SSR;
106	break;
107	case FF_PROFILE_AAC_LTP:
108	faac_cfg->aacObjectType = LTP;
109	break;
110	default:
111	av_log(avctx, AV_LOG_ERROR, "invalid AAC profile\n");
112	ret = AVERROR(EINVAL);
113	goto error;
114	}
115	faac_cfg->mpegVersion = MPEG4;
116	faac_cfg->useTns = 0;
117	faac_cfg->allowMidside = 1;
118	faac_cfg->bitRate = avctx->bit_rate / avctx->channels;
119	faac_cfg->bandWidth = avctx->cutoff;
120	if(avctx->flags & CODEC_FLAG_QSCALE) {
121	faac_cfg->bitRate = 0;
122	faac_cfg->quantqual = avctx->global_quality / FF_QP2LAMBDA;
123	}
124	faac_cfg->outputFormat = 1;
125	faac_cfg->inputFormat = FAAC_INPUT_16BIT;
126	if (avctx->channels > 2)
127	memcpy(faac_cfg->channel_map, channel_maps[avctx->channels-3],
128	avctx->channels * sizeof(int));
129
130	avctx->frame_size = samples_input / avctx->channels;
131
132	/* Set decoder specific info */
133	avctx->extradata_size = 0;
134	if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
135
136	unsigned char *buffer = NULL;
137	unsigned long decoder_specific_info_size;
138
139	if (!faacEncGetDecoderSpecificInfo(s->faac_handle, &buffer,
140	&decoder_specific_info_size)) {
141	avctx->extradata = av_malloc(decoder_specific_info_size + FF_INPUT_BUFFER_PADDING_SIZE);
142	if (!avctx->extradata) {
143	ret = AVERROR(ENOMEM);
144	goto error;
145	}
146	avctx->extradata_size = decoder_specific_info_size;
147	memcpy(avctx->extradata, buffer, avctx->extradata_size);
148	faac_cfg->outputFormat = 0;
149	}
150	free(buffer);
151	}
152
153	if (!faacEncSetConfiguration(s->faac_handle, faac_cfg)) {
154	int i;
155	for (i = avctx->bit_rate/1000; i ; i--) {
156	faac_cfg->bitRate = 1000*i / avctx->channels;
157	if (faacEncSetConfiguration(s->faac_handle, faac_cfg))
158	break;
159	}
160	if (!i) {
161	av_log(avctx, AV_LOG_ERROR, "libfaac doesn't support this output format!\n");
162	ret = AVERROR(EINVAL);
163	goto error;
164	} else {
165	avctx->bit_rate = 1000*i;
166	av_log(avctx, AV_LOG_WARNING, "libfaac doesn't support the specified bitrate, using %dkbit/s instead\n", i);
167	}
168	}
169
170	avctx->delay = FAAC_DELAY_SAMPLES;
171	ff_af_queue_init(avctx, &s->afq);
172
173	return 0;
174	error:
175	Faac_encode_close(avctx);
176	return ret;
177	}
178
179	static int Faac_encode_frame(AVCodecContext avctx, AVPacket avpkt,
180	const AVFrame frame, int got_packet_ptr)
181	{
182	FaacAudioContext *s = avctx->priv_data;
183	int bytes_written, ret;
184	int num_samples = frame ? frame->nb_samples : 0;
185	void *samples = frame ? frame->data[0] : NULL;
186
187	if ((ret = ff_alloc_packet2(avctx, avpkt, (7 + 768) * avctx->channels)) < 0)
188	return ret;
189
190	bytes_written = faacEncEncode(s->faac_handle, samples,
191	num_samples * avctx->channels,
192	avpkt->data, avpkt->size);
193	if (bytes_written < 0) {
194	av_log(avctx, AV_LOG_ERROR, "faacEncEncode() error\n");
195	return bytes_written;
196	}
197
198	/* add current frame to the queue */
199	if (frame) {
200	if ((ret = ff_af_queue_add(&s->afq, frame)) < 0)
201	return ret;
202	}
203
204	if (!bytes_written)
205	return 0;
206
207	/* Get the next frame pts/duration */
208	ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
209	&avpkt->duration);
210
211	avpkt->size = bytes_written;
212	*got_packet_ptr = 1;
213	return 0;
214	}
215
216	static const AVProfile profiles[] = {
217	{ FF_PROFILE_AAC_MAIN, "Main" },
218	{ FF_PROFILE_AAC_LOW, "LC" },
219	{ FF_PROFILE_AAC_SSR, "SSR" },
220	{ FF_PROFILE_AAC_LTP, "LTP" },
221	{ FF_PROFILE_UNKNOWN },
222	};
223
224	static const uint64_t faac_channel_layouts[] = {
225	AV_CH_LAYOUT_MONO,
226	AV_CH_LAYOUT_STEREO,
227	AV_CH_LAYOUT_SURROUND,
228	AV_CH_LAYOUT_4POINT0,
229	AV_CH_LAYOUT_5POINT0_BACK,
230	AV_CH_LAYOUT_5POINT1_BACK,
231	0
232	};
233
234	AVCodec ff_libfaac_encoder = {
235	.name = "libfaac",
236	.long_name = NULL_IF_CONFIG_SMALL("libfaac AAC (Advanced Audio Coding)"),
237	.type = AVMEDIA_TYPE_AUDIO,
238	.id = AV_CODEC_ID_AAC,
239	.priv_data_size = sizeof(FaacAudioContext),
240	.init = Faac_encode_init,
241	.encode2 = Faac_encode_frame,
242	.close = Faac_encode_close,
243	.capabilities = CODEC_CAP_SMALL_LAST_FRAME \| CODEC_CAP_DELAY,
244	.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
245	AV_SAMPLE_FMT_NONE },
246	.profiles = NULL_IF_CONFIG_SMALL(profiles),
247	.channel_layouts = faac_channel_layouts,
248	};