[fdkaac.git] / src / aacenc.c

/* 
 * Copyright (C) 2013 nu774
 * For conditions of distribution and use, see copyright notice in COPYING
 */
#if HAVE_CONFIG_H
#  include "config.h"
#endif
#if HAVE_STDINT_H
#  include <stdint.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "aacenc.h"

int aacenc_is_sbr_ratio_available()
{
#if AACENCODER_LIB_VL0 < 3 || (AACENCODER_LIB_VL0==3 && AACENCODER_LIB_VL1<4)
    return 0;
#else
    LIB_INFO lib_info;
    aacenc_get_lib_info(&lib_info);
    return lib_info.version > 0x03040000;
#endif
}

int aacenc_is_sbr_active(const aacenc_param_t *params)
{
    switch (params->profile) {
    case AOT_SBR: case AOT_PS: case AOT_MP2_SBR: case AOT_MP2_PS:
    case AOT_DABPLUS_SBR: case AOT_DABPLUS_PS:
    case AOT_DRM_SBR: case AOT_DRM_MPEG_PS:
        return 1;
    }
    if (params->profile == AOT_ER_AAC_ELD && params->lowdelay_sbr)
        return 1;
    return 0;
}

int aacenc_is_dual_rate_sbr(const aacenc_param_t *params)
{
    if (params->profile == AOT_PS || params->profile == AOT_MP2_PS)
        return 1;
    else if (params->profile == AOT_SBR || params->profile == AOT_MP2_SBR)
        return params->sbr_ratio == 0 || params->sbr_ratio == 2;
    else if (params->profile == AOT_ER_AAC_ELD && params->lowdelay_sbr)
        return params->sbr_ratio == 2;
    return 0;
}

void aacenc_get_lib_info(LIB_INFO *info)
{
    LIB_INFO *lib_info = 0;
    lib_info = calloc(FDK_MODULE_LAST, sizeof(LIB_INFO));
    if (aacEncGetLibInfo(lib_info) == AACENC_OK) {
        int i;
        for (i = 0; i < FDK_MODULE_LAST; ++i) {
            if (lib_info[i].module_id == FDK_AACENC) {
                memcpy(info, &lib_info[i], sizeof(LIB_INFO));
                break;
            }
        }
    }
    free(lib_info);
}

static const unsigned aacenc_sampling_freq_tab[] = {
    96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 
    16000, 12000, 11025, 8000, 7350, 0, 0, 0
};

static
unsigned sampling_freq_index(unsigned rate)
{
    unsigned i;
    for (i = 0; aacenc_sampling_freq_tab[i]; ++i)
        if (aacenc_sampling_freq_tab[i] == rate)
            return i;
    return 0xf;
}

/*
 * Append backward compatible SBR/PS signaling to implicit signaling ASC,
 * if SBR/PS is present.
 */
int aacenc_mp4asc(const aacenc_param_t *params,
                  const uint8_t *asc, uint32_t ascsize,
                  uint8_t *outasc, uint32_t *outsize)
{
    unsigned asc_sfreq = aacenc_sampling_freq_tab[(asc[0]&0x7)<<1 |asc[1]>>7];
    unsigned shift = aacenc_is_dual_rate_sbr(params);

    switch (params->profile) {
    case AOT_SBR:
    case AOT_PS:
        if (!shift)
            break;
        if (*outsize < ascsize + 3)
            return -1;
        memcpy(outasc, asc, ascsize);
        /* syncExtensionType:11 (value:0x2b7) */
        outasc[ascsize+0] = 0x2b << 1;
        outasc[ascsize+1] = 0x7 << 5;
        /* extensionAudioObjectType:5 (value:5)*/
        outasc[ascsize+1] |= 5;
        /* sbrPresentFlag:1 (value:1) */
        outasc[ascsize+2] = 0x80;
        /* extensionSamplingFrequencyIndex:4 */
        outasc[ascsize+2] |= sampling_freq_index(asc_sfreq << shift) << 3;
        if (params->profile == AOT_SBR) {
            *outsize = ascsize + 3;
            return 0;
        }
        if (*outsize < ascsize + 5)
            return -1;
        /* syncExtensionType:11 (value:0x548) */
        outasc[ascsize+2] |= 0x5;
        outasc[ascsize+3] = 0x48;
        /* psPresentFlag:1 (value:1) */
        outasc[ascsize+4] = 0x80;
        *outsize = ascsize + 5;
        return 0;
    }
    if (*outsize < ascsize)
        return -1;
    memcpy(outasc, asc, ascsize);
    *outsize = ascsize;
    return 0;
}

static
int aacenc_channel_mode(const pcm_sample_description_t *format)
{
    uint32_t chanmask = format->channel_mask;

    if (format->channels_per_frame > 8)
        return 0;
    if (!chanmask) {
        static uint32_t defaults[] = { 0x4, 0x3, 0x7, 0, 0x37, 0x3f, 0, 0x63f };
        chanmask = defaults[format->channels_per_frame - 1];
    }
    switch (chanmask) {
    case 0x3:   return MODE_2;
    case 0x4:   return MODE_1;
    case 0x7:   return MODE_1_2;
    case 0x37:  return MODE_1_2_2;
    case 0x3f:  return MODE_1_2_2_1;
    case 0x107: return MODE_1_2_1;
    case 0x607: return MODE_1_2_2;
    case 0x60f: return MODE_1_2_2_1;
#if AACENCODER_LIB_VL0 > 3 || (AACENCODER_LIB_VL0==3 && AACENCODER_LIB_VL1>=4)
    case 0xff:  return MODE_1_2_2_2_1;
    case 0x63f: return MODE_7_1_REAR_SURROUND;
#endif
    }
    return 0;
}

int aacenc_init(HANDLE_AACENCODER *encoder, const aacenc_param_t *params,
                const pcm_sample_description_t *format,
                AACENC_InfoStruct *info)
{
    int channel_mode;
    int aot;
    LIB_INFO lib_info;

    *encoder = 0;
    aacenc_get_lib_info(&lib_info);

    if ((channel_mode = aacenc_channel_mode(format)) == 0) {
        fprintf(stderr, "ERROR: unsupported channel layout\n");
        goto FAIL;
    }
    if (aacEncOpen(encoder, 0, 0) != AACENC_OK) {
        fprintf(stderr, "ERROR: aacEncOpen() failed\n");
        goto FAIL;
    }
    aot = (params->profile ? params->profile : AOT_AAC_LC);
    if (aacEncoder_SetParam(*encoder, AACENC_AOT, aot) != AACENC_OK) {
        fprintf(stderr, "ERROR: unsupported profile\n");
        goto FAIL;
    }
    if (params->bitrate_mode == 0)
        aacEncoder_SetParam(*encoder, AACENC_BITRATE, params->bitrate);
    else if (aacEncoder_SetParam(*encoder, AACENC_BITRATEMODE,
                                 params->bitrate_mode) != AACENC_OK) {
        fprintf(stderr, "ERROR: unsupported bitrate mode\n");
        goto FAIL;
    }
    if (aacEncoder_SetParam(*encoder, AACENC_SAMPLERATE,
                            format->sample_rate) != AACENC_OK) {
        fprintf(stderr, "ERROR: unsupported sample rate\n");
        goto FAIL;
    }
    if (aacEncoder_SetParam(*encoder, AACENC_CHANNELMODE,
                            channel_mode) != AACENC_OK) {
        fprintf(stderr, "ERROR: unsupported channel mode\n");
        goto FAIL;
    }
    aacEncoder_SetParam(*encoder, AACENC_BANDWIDTH, params->bandwidth);
    aacEncoder_SetParam(*encoder, AACENC_CHANNELORDER, 1);
    aacEncoder_SetParam(*encoder, AACENC_AFTERBURNER, !!params->afterburner);

    aacEncoder_SetParam(*encoder, AACENC_SBR_MODE, params->lowdelay_sbr);

#if AACENCODER_LIB_VL0 > 3 || (AACENCODER_LIB_VL0==3 && AACENCODER_LIB_VL1>=4)
    if (lib_info.version > 0x03040000)
        aacEncoder_SetParam(*encoder, AACENC_SBR_RATIO, params->sbr_ratio);
#endif

    if (aacEncoder_SetParam(*encoder, AACENC_TRANSMUX,
                            params->transport_format) != AACENC_OK) {
        fprintf(stderr, "ERROR: unsupported transport format\n");
        goto FAIL;
    }
    if (aacEncoder_SetParam(*encoder, AACENC_SIGNALING_MODE,
                            params->sbr_signaling) != AACENC_OK) {
        fprintf(stderr, "ERROR: failed to set SBR signaling mode\n");
        goto FAIL;
    }
    if (params->adts_crc_check)
        aacEncoder_SetParam(*encoder, AACENC_PROTECTION, 1);
    if (params->header_period)
        aacEncoder_SetParam(*encoder, AACENC_HEADER_PERIOD,
                            params->header_period);

    if (aacEncEncode(*encoder, 0, 0, 0, 0) != AACENC_OK) {
        fprintf(stderr, "ERROR: encoder initialization failed\n");
        goto FAIL;
    }
    if (aacEncInfo(*encoder, info) != AACENC_OK) {
        fprintf(stderr, "ERROR: cannot retrieve encoder info\n");
        goto FAIL;
    }
    return 0;
FAIL:
    if (encoder)
        aacEncClose(encoder);
    return -1;
}

int aac_encode_frame(HANDLE_AACENCODER encoder,
                     const pcm_sample_description_t *format,
                     const int16_t *input, unsigned iframes,
                     aacenc_frame_t *output)
{
    uint32_t ilen = iframes * format->channels_per_frame;
    AACENC_BufDesc ibdesc = { 0 }, obdesc = { 0 };
    AACENC_InArgs iargs = { 0 };
    AACENC_OutArgs oargs = { 0 };
    void *ibufs[] = { (void*)input };
    void *obufs[1];
    INT ibuf_ids[] = { IN_AUDIO_DATA };
    INT obuf_ids[] = { OUT_BITSTREAM_DATA };
    INT ibuf_sizes[] = { ilen * sizeof(int16_t) };
    INT obuf_sizes[1];
    INT ibuf_el_sizes[] = { sizeof(int16_t) };
    INT obuf_el_sizes[] = { 1 };
    AACENC_ERROR err;
    unsigned channel_mode, obytes;

    channel_mode = aacEncoder_GetParam(encoder, AACENC_CHANNELMODE);
    obytes = 6144 / 8 * channel_mode;
    if (!output->data || output->capacity < obytes) {
        uint8_t *p = realloc(output->data, obytes);
        if (!p) return -1;
        output->capacity = obytes;
        output->data = p;
    }
    obufs[0] = output->data;
    obuf_sizes[0] = obytes;

    iargs.numInSamples = ilen ? ilen : -1; /* -1 for signaling EOF */
    ibdesc.numBufs = 1;
    ibdesc.bufs = ibufs;
    ibdesc.bufferIdentifiers = ibuf_ids;
    ibdesc.bufSizes = ibuf_sizes;
    ibdesc.bufElSizes = ibuf_el_sizes;
    obdesc.numBufs = 1;
    obdesc.bufs = obufs;
    obdesc.bufferIdentifiers = obuf_ids;
    obdesc.bufSizes = obuf_sizes;
    obdesc.bufElSizes = obuf_el_sizes;

    err = aacEncEncode(encoder, &ibdesc, &obdesc, &iargs, &oargs);
    if (err != AACENC_ENCODE_EOF && err != AACENC_OK) {
        fprintf(stderr, "ERROR: aacEncEncode() failed\n");
        return -1;
    }
    output->size = oargs.numOutBytes;
    return oargs.numInSamples / format->channels_per_frame;
}
Commit	Line	Data
48e2f01c	1	/*
	2	* Copyright (C) 2013 nu774
	3	* For conditions of distribution and use, see copyright notice in COPYING
	4	*/
	5	#if HAVE_CONFIG_H
	6	# include "config.h"
	7	#endif
	8	#if HAVE_STDINT_H
	9	# include <stdint.h>
	10	#endif
	11	#include <stdio.h>
	12	#include <stdlib.h>
9b8f9915	13	#include <string.h>
48e2f01c	14	#include "aacenc.h"
48e2f01c	15
e1adc178	16	int aacenc_is_sbr_ratio_available()
	17	{
	18	#if AACENCODER_LIB_VL0 < 3 \|\| (AACENCODER_LIB_VL0==3 && AACENCODER_LIB_VL1<4)
	19	return 0;
	20	#else
	21	LIB_INFO lib_info;
	22	aacenc_get_lib_info(&lib_info);
	23	return lib_info.version > 0x03040000;
	24	#endif
	25	}
	26
48e2f01c	27	int aacenc_is_sbr_active(const aacenc_param_t *params)
	28	{
	29	switch (params->profile) {
	30	case AOT_SBR: case AOT_PS: case AOT_MP2_SBR: case AOT_MP2_PS:
	31	case AOT_DABPLUS_SBR: case AOT_DABPLUS_PS:
	32	case AOT_DRM_SBR: case AOT_DRM_MPEG_PS:
	33	return 1;
	34	}
	35	if (params->profile == AOT_ER_AAC_ELD && params->lowdelay_sbr)
	36	return 1;
	37	return 0;
	38	}
	39
e1adc178	40	int aacenc_is_dual_rate_sbr(const aacenc_param_t *params)
	41	{
	42	if (params->profile == AOT_PS \|\| params->profile == AOT_MP2_PS)
	43	return 1;
	44	else if (params->profile == AOT_SBR \|\| params->profile == AOT_MP2_SBR)
	45	return params->sbr_ratio == 0 \|\| params->sbr_ratio == 2;
	46	else if (params->profile == AOT_ER_AAC_ELD && params->lowdelay_sbr)
	47	return params->sbr_ratio == 2;
	48	return 0;
	49	}
	50
	51	void aacenc_get_lib_info(LIB_INFO *info)
	52	{
	53	LIB_INFO *lib_info = 0;
	54	lib_info = calloc(FDK_MODULE_LAST, sizeof(LIB_INFO));
	55	if (aacEncGetLibInfo(lib_info) == AACENC_OK) {
	56	int i;
	57	for (i = 0; i < FDK_MODULE_LAST; ++i) {
	58	if (lib_info[i].module_id == FDK_AACENC) {
	59	memcpy(info, &lib_info[i], sizeof(LIB_INFO));
	60	break;
	61	}
	62	}
	63	}
	64	free(lib_info);
	65	}
	66
9b8f9915	67	static const unsigned aacenc_sampling_freq_tab[] = {
	68	96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050,
	69	16000, 12000, 11025, 8000, 7350, 0, 0, 0
	70	};
	71
	72	static
	73	unsigned sampling_freq_index(unsigned rate)
	74	{
	75	unsigned i;
	76	for (i = 0; aacenc_sampling_freq_tab[i]; ++i)
	77	if (aacenc_sampling_freq_tab[i] == rate)
	78	return i;
	79	return 0xf;
	80	}
	81
	82	/*
	83	* Append backward compatible SBR/PS signaling to implicit signaling ASC,
	84	* if SBR/PS is present.
	85	*/
	86	int aacenc_mp4asc(const aacenc_param_t *params,
	87	const uint8_t *asc, uint32_t ascsize,
	88	uint8_t outasc, uint32_t outsize)
	89	{
	90	unsigned asc_sfreq = aacenc_sampling_freq_tab[(asc[0]&0x7)<<1 \|asc[1]>>7];
e1adc178	91	unsigned shift = aacenc_is_dual_rate_sbr(params);
9b8f9915	92
	93	switch (params->profile) {
	94	case AOT_SBR:
	95	case AOT_PS:
e1adc178	96	if (!shift)
e1adc178	97	break;
9b8f9915	98	if (*outsize < ascsize + 3)
	99	return -1;
	100	memcpy(outasc, asc, ascsize);
	101	/* syncExtensionType:11 (value:0x2b7) */
	102	outasc[ascsize+0] = 0x2b << 1;
	103	outasc[ascsize+1] = 0x7 << 5;
	104	/* extensionAudioObjectType:5 (value:5)*/
	105	outasc[ascsize+1] \|= 5;
	106	/* sbrPresentFlag:1 (value:1) */
	107	outasc[ascsize+2] = 0x80;
	108	/* extensionSamplingFrequencyIndex:4 */
e1adc178	109	outasc[ascsize+2] \|= sampling_freq_index(asc_sfreq << shift) << 3;
9b8f9915	110	if (params->profile == AOT_SBR) {
9b8f9915	111	*outsize = ascsize + 3;
e1adc178	112	return 0;
9b8f9915	113	}
	114	if (*outsize < ascsize + 5)
	115	return -1;
	116	/* syncExtensionType:11 (value:0x548) */
	117	outasc[ascsize+2] \|= 0x5;
	118	outasc[ascsize+3] = 0x48;
	119	/* psPresentFlag:1 (value:1) */
	120	outasc[ascsize+4] = 0x80;
	121	*outsize = ascsize + 5;
e1adc178	122	return 0;
9b8f9915	123	}
e1adc178	124	if (*outsize < ascsize)
	125	return -1;
	126	memcpy(outasc, asc, ascsize);
	127	*outsize = ascsize;
9b8f9915	128	return 0;
	129	}
	130
48e2f01c	131	static
	132	int aacenc_channel_mode(const pcm_sample_description_t *format)
	133	{
	134	uint32_t chanmask = format->channel_mask;
	135
3c0f152d	136	if (format->channels_per_frame > 8)
48e2f01c	137	return 0;
48e2f01c	138	if (!chanmask) {
3c0f152d	139	static uint32_t defaults[] = { 0x4, 0x3, 0x7, 0, 0x37, 0x3f, 0, 0x63f };
48e2f01c	140	chanmask = defaults[format->channels_per_frame - 1];
	141	}
	142	switch (chanmask) {
	143	case 0x3: return MODE_2;
	144	case 0x4: return MODE_1;
	145	case 0x7: return MODE_1_2;
	146	case 0x37: return MODE_1_2_2;
	147	case 0x3f: return MODE_1_2_2_1;
	148	case 0x107: return MODE_1_2_1;
	149	case 0x607: return MODE_1_2_2;
	150	case 0x60f: return MODE_1_2_2_1;
3c0f152d	151	#if AACENCODER_LIB_VL0 > 3 \|\| (AACENCODER_LIB_VL0==3 && AACENCODER_LIB_VL1>=4)
	152	case 0xff: return MODE_1_2_2_2_1;
	153	case 0x63f: return MODE_7_1_REAR_SURROUND;
	154	#endif
48e2f01c	155	}
	156	return 0;
	157	}
	158
	159	int aacenc_init(HANDLE_AACENCODER encoder, const aacenc_param_t params,
	160	const pcm_sample_description_t *format,
	161	AACENC_InfoStruct *info)
	162	{
	163	int channel_mode;
	164	int aot;
e1adc178	165	LIB_INFO lib_info;
48e2f01c	166
48e2f01c	167	*encoder = 0;
e1adc178	168	aacenc_get_lib_info(&lib_info);
e1adc178	169
48e2f01c	170	if ((channel_mode = aacenc_channel_mode(format)) == 0) {
	171	fprintf(stderr, "ERROR: unsupported channel layout\n");
	172	goto FAIL;
	173	}
	174	if (aacEncOpen(encoder, 0, 0) != AACENC_OK) {
	175	fprintf(stderr, "ERROR: aacEncOpen() failed\n");
	176	goto FAIL;
	177	}
	178	aot = (params->profile ? params->profile : AOT_AAC_LC);
	179	if (aacEncoder_SetParam(*encoder, AACENC_AOT, aot) != AACENC_OK) {
	180	fprintf(stderr, "ERROR: unsupported profile\n");
	181	goto FAIL;
	182	}
	183	if (params->bitrate_mode == 0)
	184	aacEncoder_SetParam(*encoder, AACENC_BITRATE, params->bitrate);
	185	else if (aacEncoder_SetParam(*encoder, AACENC_BITRATEMODE,
	186	params->bitrate_mode) != AACENC_OK) {
	187	fprintf(stderr, "ERROR: unsupported bitrate mode\n");
	188	goto FAIL;
	189	}
	190	if (aacEncoder_SetParam(*encoder, AACENC_SAMPLERATE,
	191	format->sample_rate) != AACENC_OK) {
	192	fprintf(stderr, "ERROR: unsupported sample rate\n");
	193	goto FAIL;
	194	}
e1adc178	195	if (aacEncoder_SetParam(*encoder, AACENC_CHANNELMODE,
	196	channel_mode) != AACENC_OK) {
	197	fprintf(stderr, "ERROR: unsupported channel mode\n");
	198	goto FAIL;
	199	}
48e2f01c	200	aacEncoder_SetParam(*encoder, AACENC_BANDWIDTH, params->bandwidth);
	201	aacEncoder_SetParam(*encoder, AACENC_CHANNELORDER, 1);
	202	aacEncoder_SetParam(*encoder, AACENC_AFTERBURNER, !!params->afterburner);
	203
e1adc178	204	aacEncoder_SetParam(*encoder, AACENC_SBR_MODE, params->lowdelay_sbr);
	205
	206	#if AACENCODER_LIB_VL0 > 3 \|\| (AACENCODER_LIB_VL0==3 && AACENCODER_LIB_VL1>=4)
	207	if (lib_info.version > 0x03040000)
	208	aacEncoder_SetParam(*encoder, AACENC_SBR_RATIO, params->sbr_ratio);
	209	#endif
48e2f01c	210
	211	if (aacEncoder_SetParam(*encoder, AACENC_TRANSMUX,
	212	params->transport_format) != AACENC_OK) {
	213	fprintf(stderr, "ERROR: unsupported transport format\n");
	214	goto FAIL;
	215	}
	216	if (aacEncoder_SetParam(*encoder, AACENC_SIGNALING_MODE,
	217	params->sbr_signaling) != AACENC_OK) {
f5363b23	218	fprintf(stderr, "ERROR: failed to set SBR signaling mode\n");
48e2f01c	219	goto FAIL;
	220	}
	221	if (params->adts_crc_check)
	222	aacEncoder_SetParam(*encoder, AACENC_PROTECTION, 1);
	223	if (params->header_period)
	224	aacEncoder_SetParam(*encoder, AACENC_HEADER_PERIOD,
	225	params->header_period);
	226
	227	if (aacEncEncode(*encoder, 0, 0, 0, 0) != AACENC_OK) {
	228	fprintf(stderr, "ERROR: encoder initialization failed\n");
	229	goto FAIL;
	230	}
	231	if (aacEncInfo(*encoder, info) != AACENC_OK) {
	232	fprintf(stderr, "ERROR: cannot retrieve encoder info\n");
	233	goto FAIL;
	234	}
	235	return 0;
	236	FAIL:
	237	if (encoder)
	238	aacEncClose(encoder);
	239	return -1;
	240	}
	241
	242	int aac_encode_frame(HANDLE_AACENCODER encoder,
	243	const pcm_sample_description_t *format,
	244	const int16_t *input, unsigned iframes,
d533c8e0	245	aacenc_frame_t *output)
48e2f01c	246	{
	247	uint32_t ilen = iframes * format->channels_per_frame;
	248	AACENC_BufDesc ibdesc = { 0 }, obdesc = { 0 };
	249	AACENC_InArgs iargs = { 0 };
	250	AACENC_OutArgs oargs = { 0 };
	251	void ibufs[] = { (void)input };
	252	void *obufs[1];
	253	INT ibuf_ids[] = { IN_AUDIO_DATA };
	254	INT obuf_ids[] = { OUT_BITSTREAM_DATA };
	255	INT ibuf_sizes[] = { ilen * sizeof(int16_t) };
	256	INT obuf_sizes[1];
	257	INT ibuf_el_sizes[] = { sizeof(int16_t) };
	258	INT obuf_el_sizes[] = { 1 };
	259	AACENC_ERROR err;
	260	unsigned channel_mode, obytes;
	261
	262	channel_mode = aacEncoder_GetParam(encoder, AACENC_CHANNELMODE);
3b518efd	263	obytes = 6144 / 8 * channel_mode;
d533c8e0	264	if (!output->data \|\| output->capacity < obytes) {
3b518efd	265	uint8_t *p = realloc(output->data, obytes);
3b518efd	266	if (!p) return -1;
d533c8e0	267	output->capacity = obytes;
3b518efd	268	output->data = p;
48e2f01c	269	}
3b518efd	270	obufs[0] = output->data;
48e2f01c	271	obuf_sizes[0] = obytes;
	272
	273	iargs.numInSamples = ilen ? ilen : -1; /* -1 for signaling EOF */
	274	ibdesc.numBufs = 1;
	275	ibdesc.bufs = ibufs;
	276	ibdesc.bufferIdentifiers = ibuf_ids;
	277	ibdesc.bufSizes = ibuf_sizes;
	278	ibdesc.bufElSizes = ibuf_el_sizes;
	279	obdesc.numBufs = 1;
	280	obdesc.bufs = obufs;
	281	obdesc.bufferIdentifiers = obuf_ids;
	282	obdesc.bufSizes = obuf_sizes;
	283	obdesc.bufElSizes = obuf_el_sizes;
	284
	285	err = aacEncEncode(encoder, &ibdesc, &obdesc, &iargs, &oargs);
	286	if (err != AACENC_ENCODE_EOF && err != AACENC_OK) {
	287	fprintf(stderr, "ERROR: aacEncEncode() failed\n");
	288	return -1;
	289	}
d533c8e0	290	output->size = oargs.numOutBytes;
4d48b091	291	return oargs.numInSamples / format->channels_per_frame;
48e2f01c	292	}