Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / libvo-aacenc.c
CommitLineData
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1/*
2 * AAC encoder wrapper
3 * Copyright (c) 2010 Martin Storsjo
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#include <vo-aacenc/voAAC.h>
23#include <vo-aacenc/cmnMemory.h>
24
25#include "avcodec.h"
26#include "audio_frame_queue.h"
27#include "internal.h"
28#include "mpeg4audio.h"
29
30#define FRAME_SIZE 1024
31#define ENC_DELAY 1600
32
33typedef struct AACContext {
34 VO_AUDIO_CODECAPI codec_api;
35 VO_HANDLE handle;
36 VO_MEM_OPERATOR mem_operator;
37 VO_CODEC_INIT_USERDATA user_data;
38 VO_PBYTE end_buffer;
39 AudioFrameQueue afq;
40 int last_frame;
41 int last_samples;
42} AACContext;
43
44
45static int aac_encode_close(AVCodecContext *avctx)
46{
47 AACContext *s = avctx->priv_data;
48
49 s->codec_api.Uninit(s->handle);
50 av_freep(&avctx->extradata);
51 ff_af_queue_close(&s->afq);
52 av_freep(&s->end_buffer);
53
54 return 0;
55}
56
57static av_cold int aac_encode_init(AVCodecContext *avctx)
58{
59 AACContext *s = avctx->priv_data;
60 AACENC_PARAM params = { 0 };
61 int index, ret;
62
63 avctx->frame_size = FRAME_SIZE;
f6fa7814 64 avctx->initial_padding = ENC_DELAY;
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65 s->last_frame = 2;
66 ff_af_queue_init(avctx, &s->afq);
67
68 s->end_buffer = av_mallocz(avctx->frame_size * avctx->channels * 2);
69 if (!s->end_buffer) {
70 ret = AVERROR(ENOMEM);
71 goto error;
72 }
73
74 voGetAACEncAPI(&s->codec_api);
75
76 s->mem_operator.Alloc = cmnMemAlloc;
77 s->mem_operator.Copy = cmnMemCopy;
78 s->mem_operator.Free = cmnMemFree;
79 s->mem_operator.Set = cmnMemSet;
80 s->mem_operator.Check = cmnMemCheck;
81 s->user_data.memflag = VO_IMF_USERMEMOPERATOR;
82 s->user_data.memData = &s->mem_operator;
83 s->codec_api.Init(&s->handle, VO_AUDIO_CodingAAC, &s->user_data);
84
85 params.sampleRate = avctx->sample_rate;
86 params.bitRate = avctx->bit_rate;
87 params.nChannels = avctx->channels;
88 params.adtsUsed = !(avctx->flags & CODEC_FLAG_GLOBAL_HEADER);
89 if (s->codec_api.SetParam(s->handle, VO_PID_AAC_ENCPARAM, &params)
90 != VO_ERR_NONE) {
91 av_log(avctx, AV_LOG_ERROR, "Unable to set encoding parameters\n");
92 ret = AVERROR(EINVAL);
93 goto error;
94 }
95
96 for (index = 0; index < 16; index++)
97 if (avctx->sample_rate == avpriv_mpeg4audio_sample_rates[index])
98 break;
99 if (index == 16) {
100 av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate %d\n",
101 avctx->sample_rate);
102 ret = AVERROR(ENOSYS);
103 goto error;
104 }
105 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
106 avctx->extradata_size = 2;
107 avctx->extradata = av_mallocz(avctx->extradata_size +
108 FF_INPUT_BUFFER_PADDING_SIZE);
109 if (!avctx->extradata) {
110 ret = AVERROR(ENOMEM);
111 goto error;
112 }
113
114 avctx->extradata[0] = 0x02 << 3 | index >> 1;
115 avctx->extradata[1] = (index & 0x01) << 7 | avctx->channels << 3;
116 }
117 return 0;
118error:
119 aac_encode_close(avctx);
120 return ret;
121}
122
123static int aac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
124 const AVFrame *frame, int *got_packet_ptr)
125{
126 AACContext *s = avctx->priv_data;
127 VO_CODECBUFFER input = { 0 }, output = { 0 };
128 VO_AUDIO_OUTPUTINFO output_info = { { 0 } };
129 VO_PBYTE samples;
130 int ret;
131
132 /* handle end-of-stream small frame and flushing */
133 if (!frame) {
134 if (s->last_frame <= 0)
135 return 0;
136 if (s->last_samples > 0 && s->last_samples < ENC_DELAY - FRAME_SIZE) {
137 s->last_samples = 0;
138 s->last_frame--;
139 }
140 s->last_frame--;
141 memset(s->end_buffer, 0, 2 * avctx->channels * avctx->frame_size);
142 samples = s->end_buffer;
143 } else {
144 if (frame->nb_samples < avctx->frame_size) {
145 s->last_samples = frame->nb_samples;
146 memcpy(s->end_buffer, frame->data[0], 2 * avctx->channels * frame->nb_samples);
147 samples = s->end_buffer;
148 } else {
149 samples = (VO_PBYTE)frame->data[0];
150 }
151 /* add current frame to the queue */
152 if ((ret = ff_af_queue_add(&s->afq, frame)) < 0)
153 return ret;
154 }
155
156 if ((ret = ff_alloc_packet2(avctx, avpkt, FFMAX(8192, 768 * avctx->channels))) < 0)
157 return ret;
158
159 input.Buffer = samples;
160 input.Length = 2 * avctx->channels * avctx->frame_size;
161 output.Buffer = avpkt->data;
162 output.Length = avpkt->size;
163
164 s->codec_api.SetInputData(s->handle, &input);
165 if (s->codec_api.GetOutputData(s->handle, &output, &output_info)
166 != VO_ERR_NONE) {
167 av_log(avctx, AV_LOG_ERROR, "Unable to encode frame\n");
168 return AVERROR(EINVAL);
169 }
170
171 /* Get the next frame pts/duration */
172 ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
173 &avpkt->duration);
174
175 avpkt->size = output.Length;
176 *got_packet_ptr = 1;
177 return 0;
178}
179
180/* duplicated from avpriv_mpeg4audio_sample_rates to avoid shared build
181 * failures */
182static const int mpeg4audio_sample_rates[16] = {
183 96000, 88200, 64000, 48000, 44100, 32000,
184 24000, 22050, 16000, 12000, 11025, 8000, 7350
185};
186
187AVCodec ff_libvo_aacenc_encoder = {
188 .name = "libvo_aacenc",
189 .long_name = NULL_IF_CONFIG_SMALL("Android VisualOn AAC (Advanced Audio Coding)"),
190 .type = AVMEDIA_TYPE_AUDIO,
191 .id = AV_CODEC_ID_AAC,
192 .priv_data_size = sizeof(AACContext),
193 .init = aac_encode_init,
194 .encode2 = aac_encode_frame,
195 .close = aac_encode_close,
196 .supported_samplerates = mpeg4audio_sample_rates,
197 .capabilities = CODEC_CAP_SMALL_LAST_FRAME | CODEC_CAP_DELAY,
198 .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
199 AV_SAMPLE_FMT_NONE },
200};