From 6f1af73557824b1872732b7823e881a14f870077 Mon Sep 17 00:00:00 2001
From: Diego Biurrun <diego@biurrun.de>
Date: Wed, 6 Jun 2007 00:14:18 +0000
Subject: Give all wrappers for external libraries names starting with lib.

Originally committed as revision 9226 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/libfaac.c | 154 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 154 insertions(+)
 create mode 100644 libavcodec/libfaac.c

(limited to 'libavcodec/libfaac.c')

diff --git a/libavcodec/libfaac.c b/libavcodec/libfaac.c
new file mode 100644
index 0000000000..a782381e32
--- /dev/null
+++ b/libavcodec/libfaac.c
@@ -0,0 +1,154 @@
+/*
+ * 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 faacaudio.c
+ * Interface to libfaac for aac encoding.
+ */
+
+#include "avcodec.h"
+#include <faac.h>
+
+typedef struct FaacAudioContext {
+    faacEncHandle faac_handle;
+} FaacAudioContext;
+
+static int Faac_encode_init(AVCodecContext *avctx)
+{
+    FaacAudioContext *s = avctx->priv_data;
+    faacEncConfigurationPtr faac_cfg;
+    unsigned long samples_input, max_bytes_output;
+
+    /* number of channels */
+    if (avctx->channels < 1 || avctx->channels > 6)
+        return -1;
+
+    s->faac_handle = faacEncOpen(avctx->sample_rate,
+                                 avctx->channels,
+                                 &samples_input, &max_bytes_output);
+
+    /* 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);
+        faacEncClose(s->faac_handle);
+        return -1;
+    }
+
+    /* 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");
+            faacEncClose(s->faac_handle);
+            return -1;
+    }
+    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;
+
+    avctx->frame_size = samples_input / avctx->channels;
+
+    avctx->coded_frame= avcodec_alloc_frame();
+    avctx->coded_frame->key_frame= 1;
+
+    /* 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);
+            avctx->extradata_size = decoder_specific_info_size;
+            memcpy(avctx->extradata, buffer, avctx->extradata_size);
+            faac_cfg->outputFormat = 0;
+        }
+#undef free
+        free(buffer);
+#define free please_use_av_free
+    }
+
+    if (!faacEncSetConfiguration(s->faac_handle, faac_cfg)) {
+        av_log(avctx, AV_LOG_ERROR, "libfaac doesn't support this output format!\n");
+        return -1;
+    }
+
+    return 0;
+}
+
+static int Faac_encode_frame(AVCodecContext *avctx,
+                             unsigned char *frame, int buf_size, void *data)
+{
+    FaacAudioContext *s = avctx->priv_data;
+    int bytes_written;
+
+    bytes_written = faacEncEncode(s->faac_handle,
+                                  data,
+                                  avctx->frame_size * avctx->channels,
+                                  frame,
+                                  buf_size);
+
+    return bytes_written;
+}
+
+static int Faac_encode_close(AVCodecContext *avctx)
+{
+    FaacAudioContext *s = avctx->priv_data;
+
+    av_freep(&avctx->coded_frame);
+    av_freep(&avctx->extradata);
+
+    faacEncClose(s->faac_handle);
+    return 0;
+}
+
+AVCodec libfaac_encoder = {
+    "libfaac",
+    CODEC_TYPE_AUDIO,
+    CODEC_ID_AAC,
+    sizeof(FaacAudioContext),
+    Faac_encode_init,
+    Faac_encode_frame,
+    Faac_encode_close
+};
-- 
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