Add missing files from ffmpeg, write a README.rockbox and a makefile.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27742 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 1188 insertions, 0 deletions

diff --git a/apps/codecs/libwmavoice/utils.c b/apps/codecs/libwmavoice/utils.c
new file mode 100644
index 0000000..ad098f4
--- /dev/null
+++ b/apps/codecs/libwmavoice/utils.c
@@ -0,0 +1,1188 @@
+/*
+ * utils for libavcodec
+ * Copyright (c) 2001 Fabrice Bellard
+ * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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
+ * utils.
+ */
+
+//#include "libavutil/avstring.h"
+//#include "libavutil/integer.h"
+//#include "libavutil/crc.h"
+//#include "libavutil/pixdesc.h"
+//#include "libavcore/imgutils.h"
+#include "avcodec.h"
+//#include "dsputil.h"
+//#include "opt.h"
+//#include "imgconvert.h"
+//#include "audioconvert.h"
+#include "internal.h"
+#include <stdlib.h>
+#include <stdarg.h>
+#include <limits.h>
+#include <float.h>
+
+#if 0
+static int volatile entangled_thread_counter=0;
+int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
+static void *codec_mutex;
+
+void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
+{
+    if(min_size < *size)
+        return ptr;
+
+    *size= FFMAX(17*min_size/16 + 32, min_size);
+
+    ptr= av_realloc(ptr, *size);
+    if(!ptr) //we could set this to the unmodified min_size but this is safer if the user lost the ptr and uses NULL now
+        *size= 0;
+
+    return ptr;
+}
+
+void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size)
+{
+    void **p = ptr;
+    if (min_size < *size)
+        return;
+    *size= FFMAX(17*min_size/16 + 32, min_size);
+    av_free(*p);
+    *p = av_malloc(*size);
+    if (!*p) *size = 0;
+}
+
+/* encoder management */
+static AVCodec *first_avcodec = NULL;
+
+AVCodec *av_codec_next(AVCodec *c){
+    if(c) return c->next;
+    else  return first_avcodec;
+}
+
+void avcodec_register(AVCodec *codec)
+{
+    AVCodec **p;
+    avcodec_init();
+    p = &first_avcodec;
+    while (*p != NULL) p = &(*p)->next;
+    *p = codec;
+    codec->next = NULL;
+}
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+void register_avcodec(AVCodec *codec)
+{
+    avcodec_register(codec);
+}
+#endif
+
+unsigned avcodec_get_edge_width(void)
+{
+    return EDGE_WIDTH;
+}
+
+void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
+    s->coded_width = width;
+    s->coded_height= height;
+    s->width = -((-width )>>s->lowres);
+    s->height= -((-height)>>s->lowres);
+}
+
+typedef struct InternalBuffer{
+    int last_pic_num;
+    uint8_t *base[4];
+    uint8_t *data[4];
+    int linesize[4];
+    int width, height;
+    enum PixelFormat pix_fmt;
+}InternalBuffer;
+
+#define INTERNAL_BUFFER_SIZE 32
+
+void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){
+    int w_align= 1;
+    int h_align= 1;
+
+    switch(s->pix_fmt){
+    case PIX_FMT_YUV420P:
+    case PIX_FMT_YUYV422:
+    case PIX_FMT_UYVY422:
+    case PIX_FMT_YUV422P:
+    case PIX_FMT_YUV440P:
+    case PIX_FMT_YUV444P:
+    case PIX_FMT_GRAY8:
+    case PIX_FMT_GRAY16BE:
+    case PIX_FMT_GRAY16LE:
+    case PIX_FMT_YUVJ420P:
+    case PIX_FMT_YUVJ422P:
+    case PIX_FMT_YUVJ440P:
+    case PIX_FMT_YUVJ444P:
+    case PIX_FMT_YUVA420P:
+        w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
+        h_align= 16;
+        if(s->codec_id == CODEC_ID_MPEG2VIDEO || s->codec_id == CODEC_ID_MJPEG || s->codec_id == CODEC_ID_AMV || s->codec_id == CODEC_ID_THP)
+            h_align= 32; // interlaced is rounded up to 2 MBs
+        break;
+    case PIX_FMT_YUV411P:
+    case PIX_FMT_UYYVYY411:
+        w_align=32;
+        h_align=8;
+        break;
+    case PIX_FMT_YUV410P:
+        if(s->codec_id == CODEC_ID_SVQ1){
+            w_align=64;
+            h_align=64;
+        }
+    case PIX_FMT_RGB555:
+        if(s->codec_id == CODEC_ID_RPZA){
+            w_align=4;
+            h_align=4;
+        }
+    case PIX_FMT_PAL8:
+    case PIX_FMT_BGR8:
+    case PIX_FMT_RGB8:
+        if(s->codec_id == CODEC_ID_SMC){
+            w_align=4;
+            h_align=4;
+        }
+        break;
+    case PIX_FMT_BGR24:
+        if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
+            w_align=4;
+            h_align=4;
+        }
+        break;
+    default:
+        w_align= 1;
+        h_align= 1;
+        break;
+    }
+
+    *width = FFALIGN(*width , w_align);
+    *height= FFALIGN(*height, h_align);
+    if(s->codec_id == CODEC_ID_H264)
+        *height+=2; // some of the optimized chroma MC reads one line too much
+
+    linesize_align[0] =
+    linesize_align[1] =
+    linesize_align[2] =
+    linesize_align[3] = STRIDE_ALIGN;
+//STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
+//we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
+//picture size unneccessarily in some cases. The solution here is not
+//pretty and better ideas are welcome!
+#if HAVE_MMX
+    if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
+       s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
+       s->codec_id == CODEC_ID_VP6A) {
+        linesize_align[0] =
+        linesize_align[1] =
+        linesize_align[2] = 16;
+    }
+#endif
+}
+
+void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
+    int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
+    int linesize_align[4];
+    int align;
+    avcodec_align_dimensions2(s, width, height, linesize_align);
+    align = FFMAX(linesize_align[0], linesize_align[3]);
+    linesize_align[1] <<= chroma_shift;
+    linesize_align[2] <<= chroma_shift;
+    align = FFMAX3(align, linesize_align[1], linesize_align[2]);
+    *width=FFALIGN(*width, align);
+}
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
+    return av_check_image_size(w, h, 0, av_log_ctx);
+}
+#endif
+
+int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
+    int i;
+    int w= s->width;
+    int h= s->height;
+    InternalBuffer *buf;
+    int *picture_number;
+
+    if(pic->data[0]!=NULL) {
+        av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
+        return -1;
+    }
+    if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
+        av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
+        return -1;
+    }
+
+    if(av_check_image_size(w, h, 0, s))
+        return -1;
+
+    if(s->internal_buffer==NULL){
+        s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
+    }
+#if 0
+    s->internal_buffer= av_fast_realloc(
+        s->internal_buffer,
+        &s->internal_buffer_size,
+        sizeof(InternalBuffer)*FFMAX(99,  s->internal_buffer_count+1)/*FIXME*/
+        );
+#endif
+
+    buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
+    picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
+    (*picture_number)++;
+
+    if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
+        for(i=0; i<4; i++){
+            av_freep(&buf->base[i]);
+            buf->data[i]= NULL;
+        }
+    }
+
+    if(buf->base[0]){
+        pic->age= *picture_number - buf->last_pic_num;
+        buf->last_pic_num= *picture_number;
+    }else{
+        int h_chroma_shift, v_chroma_shift;
+        int size[4] = {0};
+        int tmpsize;
+        int unaligned;
+        AVPicture picture;
+        int stride_align[4];
+
+        avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
+
+        avcodec_align_dimensions2(s, &w, &h, stride_align);
+
+        if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
+            w+= EDGE_WIDTH*2;
+            h+= EDGE_WIDTH*2;
+        }
+
+        do {
+            // NOTE: do not align linesizes individually, this breaks e.g. assumptions
+            // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
+            av_fill_image_linesizes(picture.linesize, s->pix_fmt, w);
+            // increase alignment of w for next try (rhs gives the lowest bit set in w)
+            w += w & ~(w-1);
+
+            unaligned = 0;
+            for (i=0; i<4; i++){
+                unaligned |= picture.linesize[i] % stride_align[i];
+            }
+        } while (unaligned);
+
+        tmpsize = av_fill_image_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize);
+        if (tmpsize < 0)
+            return -1;
+
+        for (i=0; i<3 && picture.data[i+1]; i++)
+            size[i] = picture.data[i+1] - picture.data[i];
+        size[i] = tmpsize - (picture.data[i] - picture.data[0]);
+
+        buf->last_pic_num= -256*256*256*64;
+        memset(buf->base, 0, sizeof(buf->base));
+        memset(buf->data, 0, sizeof(buf->data));
+
+        for(i=0; i<4 && size[i]; i++){
+            const int h_shift= i==0 ? 0 : h_chroma_shift;
+            const int v_shift= i==0 ? 0 : v_chroma_shift;
+
+            buf->linesize[i]= picture.linesize[i];
+
+            buf->base[i]= av_malloc(size[i]+16); //FIXME 16
+            if(buf->base[i]==NULL) return -1;
+            memset(buf->base[i], 128, size[i]);
+
+            // no edge if EDGE EMU or not planar YUV
+            if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
+                buf->data[i] = buf->base[i];
+            else
+                buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
+        }
+        if(size[1] && !size[2])
+            ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
+        buf->width  = s->width;
+        buf->height = s->height;
+        buf->pix_fmt= s->pix_fmt;
+        pic->age= 256*256*256*64;
+    }
+    pic->type= FF_BUFFER_TYPE_INTERNAL;
+
+    for(i=0; i<4; i++){
+        pic->base[i]= buf->base[i];
+        pic->data[i]= buf->data[i];
+        pic->linesize[i]= buf->linesize[i];
+    }
+    s->internal_buffer_count++;
+
+    pic->reordered_opaque= s->reordered_opaque;
+
+    if(s->debug&FF_DEBUG_BUFFERS)
+        av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
+
+    return 0;
+}
+
+void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
+    int i;
+    InternalBuffer *buf, *last;
+
+    assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
+    assert(s->internal_buffer_count);
+
+    buf = NULL; /* avoids warning */
+    for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
+        buf= &((InternalBuffer*)s->internal_buffer)[i];
+        if(buf->data[0] == pic->data[0])
+            break;
+    }
+    assert(i < s->internal_buffer_count);
+    s->internal_buffer_count--;
+    last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
+
+    FFSWAP(InternalBuffer, *buf, *last);
+
+    for(i=0; i<4; i++){
+        pic->data[i]=NULL;
+//        pic->base[i]=NULL;
+    }
+//printf("R%X\n", pic->opaque);
+
+    if(s->debug&FF_DEBUG_BUFFERS)
+        av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
+}
+
+int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
+    AVFrame temp_pic;
+    int i;
+
+    /* If no picture return a new buffer */
+    if(pic->data[0] == NULL) {
+        /* We will copy from buffer, so must be readable */
+        pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
+        return s->get_buffer(s, pic);
+    }
+
+    /* If internal buffer type return the same buffer */
+    if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
+        pic->reordered_opaque= s->reordered_opaque;
+        return 0;
+    }
+
+    /*
+     * Not internal type and reget_buffer not overridden, emulate cr buffer
+     */
+    temp_pic = *pic;
+    for(i = 0; i < 4; i++)
+        pic->data[i] = pic->base[i] = NULL;
+    pic->opaque = NULL;
+    /* Allocate new frame */
+    if (s->get_buffer(s, pic))
+        return -1;
+    /* Copy image data from old buffer to new buffer */
+    av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
+             s->height);
+    s->release_buffer(s, &temp_pic); // Release old frame
+    return 0;
+}
+
+int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
+    int i;
+
+    for(i=0; i<count; i++){
+        int r= func(c, (char*)arg + i*size);
+        if(ret) ret[i]= r;
+    }
+    return 0;
+}
+
+int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
+    int i;
+
+    for(i=0; i<count; i++){
+        int r= func(c, arg, i, 0);
+        if(ret) ret[i]= r;
+    }
+    return 0;
+}
+
+enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
+    while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
+        ++fmt;
+    return fmt[0];
+}
+
+void avcodec_get_frame_defaults(AVFrame *pic){
+    memset(pic, 0, sizeof(AVFrame));
+
+    pic->pts= AV_NOPTS_VALUE;
+    pic->key_frame= 1;
+}
+
+AVFrame *avcodec_alloc_frame(void){
+    AVFrame *pic= av_malloc(sizeof(AVFrame));
+
+    if(pic==NULL) return NULL;
+
+    avcodec_get_frame_defaults(pic);
+
+    return pic;
+}
+
+int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
+{
+    int ret= -1;
+
+    /* If there is a user-supplied mutex locking routine, call it. */
+    if (ff_lockmgr_cb) {
+        if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
+            return -1;
+    }
+
+    entangled_thread_counter++;
+    if(entangled_thread_counter != 1){
+        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
+        goto end;
+    }
+
+    if(avctx->codec || !codec)
+        goto end;
+
+    if (codec->priv_data_size > 0) {
+        avctx->priv_data = av_mallocz(codec->priv_data_size);
+        if (!avctx->priv_data) {
+            ret = AVERROR(ENOMEM);
+            goto end;
+        }
+    } else {
+        avctx->priv_data = NULL;
+    }
+
+    if(avctx->coded_width && avctx->coded_height)
+        avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
+    else if(avctx->width && avctx->height)
+        avcodec_set_dimensions(avctx, avctx->width, avctx->height);
+
+#define SANE_NB_CHANNELS 128U
+    if (((avctx->coded_width || avctx->coded_height)
+        && av_check_image_size(avctx->coded_width, avctx->coded_height, 0, avctx))
+        || avctx->channels > SANE_NB_CHANNELS) {
+        ret = AVERROR(EINVAL);
+        goto free_and_end;
+    }
+
+    avctx->codec = codec;
+    if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
+        avctx->codec_id == CODEC_ID_NONE) {
+        avctx->codec_type = codec->type;
+        avctx->codec_id   = codec->id;
+    }
+    if(avctx->codec_id != codec->id || avctx->codec_type != codec->type){
+        av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
+        goto free_and_end;
+    }
+    avctx->frame_number = 0;
+    if(avctx->codec->init){
+        if(avctx->codec_type == AVMEDIA_TYPE_VIDEO &&
+           avctx->codec->max_lowres < avctx->lowres){
+            av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
+                   avctx->codec->max_lowres);
+            goto free_and_end;
+        }
+
+        ret = avctx->codec->init(avctx);
+        if (ret < 0) {
+            goto free_and_end;
+        }
+    }
+    ret=0;
+end:
+    entangled_thread_counter--;
+
+    /* Release any user-supplied mutex. */
+    if (ff_lockmgr_cb) {
+        (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
+    }
+    return ret;
+free_and_end:
+    av_freep(&avctx->priv_data);
+    avctx->codec= NULL;
+    goto end;
+}
+
+int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+                         const short *samples)
+{
+    if(buf_size < FF_MIN_BUFFER_SIZE && 0){
+        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
+        return -1;
+    }
+    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
+        int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
+        avctx->frame_number++;
+        return ret;
+    }else
+        return 0;
+}
+
+int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+                         const AVFrame *pict)
+{
+    if(buf_size < FF_MIN_BUFFER_SIZE){
+        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
+        return -1;
+    }
+    if(av_check_image_size(avctx->width, avctx->height, 0, avctx))
+        return -1;
+    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
+        int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
+        avctx->frame_number++;
+        emms_c(); //needed to avoid an emms_c() call before every return;
+
+        return ret;
+    }else
+        return 0;
+}
+
+int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+                            const AVSubtitle *sub)
+{
+    int ret;
+    if(sub->start_display_time) {
+        av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
+        return -1;
+    }
+    if(sub->num_rects == 0 || !sub->rects)
+        return -1;
+    ret = avctx->codec->encode(avctx, buf, buf_size, sub);
+    avctx->frame_number++;
+    return ret;
+}
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
+                         int *got_picture_ptr,
+                         const uint8_t *buf, int buf_size)
+{
+    AVPacket avpkt;
+    av_init_packet(&avpkt);
+    avpkt.data = buf;
+    avpkt.size = buf_size;
+    // HACK for CorePNG to decode as normal PNG by default
+    avpkt.flags = AV_PKT_FLAG_KEY;
+
+    return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
+}
+#endif
+
+int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
+                         int *got_picture_ptr,
+                         AVPacket *avpkt)
+{
+    int ret;
+
+    *got_picture_ptr= 0;
+    if((avctx->coded_width||avctx->coded_height) && av_check_image_size(avctx->coded_width, avctx->coded_height, 0, avctx))
+        return -1;
+    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
+        ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
+                                avpkt);
+
+        emms_c(); //needed to avoid an emms_c() call before every return;
+
+        if (*got_picture_ptr)
+            avctx->frame_number++;
+    }else
+        ret= 0;
+
+    return ret;
+}
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
+                         int *frame_size_ptr,
+                         const uint8_t *buf, int buf_size)
+{
+    AVPacket avpkt;
+    av_init_packet(&avpkt);
+    avpkt.data = buf;
+    avpkt.size = buf_size;
+
+    return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
+}
+#endif
+
+int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
+                         int *frame_size_ptr,
+                         AVPacket *avpkt)
+{
+    int ret;
+
+    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
+        //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
+        if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
+            av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
+            return -1;
+        }
+        if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
+        *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
+            av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
+            return -1;
+        }
+
+        ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
+        avctx->frame_number++;
+    }else{
+        ret= 0;
+        *frame_size_ptr=0;
+    }
+    return ret;
+}
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
+                            int *got_sub_ptr,
+                            const uint8_t *buf, int buf_size)
+{
+    AVPacket avpkt;
+    av_init_packet(&avpkt);
+    avpkt.data = buf;
+    avpkt.size = buf_size;
+
+    return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
+}
+#endif
+
+int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
+                            int *got_sub_ptr,
+                            AVPacket *avpkt)
+{
+    int ret;
+
+    *got_sub_ptr = 0;
+    ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
+    if (*got_sub_ptr)
+        avctx->frame_number++;
+    return ret;
+}
+
+void avsubtitle_free(AVSubtitle *sub)
+{
+    int i;
+
+    for (i = 0; i < sub->num_rects; i++)
+    {
+        av_freep(&sub->rects[i]->pict.data[0]);
+        av_freep(&sub->rects[i]->pict.data[1]);
+        av_freep(&sub->rects[i]->pict.data[2]);
+        av_freep(&sub->rects[i]->pict.data[3]);
+        av_freep(&sub->rects[i]->text);
+        av_freep(&sub->rects[i]->ass);
+        av_freep(&sub->rects[i]);
+    }
+
+    av_freep(&sub->rects);
+
+    memset(sub, 0, sizeof(AVSubtitle));
+}
+
+av_cold int avcodec_close(AVCodecContext *avctx)
+{
+    /* If there is a user-supplied mutex locking routine, call it. */
+    if (ff_lockmgr_cb) {
+        if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
+            return -1;
+    }
+
+    entangled_thread_counter++;
+    if(entangled_thread_counter != 1){
+        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
+        entangled_thread_counter--;
+        return -1;
+    }
+
+    if (HAVE_THREADS && avctx->thread_opaque)
+        avcodec_thread_free(avctx);
+    if (avctx->codec && avctx->codec->close)
+        avctx->codec->close(avctx);
+    avcodec_default_free_buffers(avctx);
+    avctx->coded_frame = NULL;
+    av_freep(&avctx->priv_data);
+    if(avctx->codec && avctx->codec->encode)
+        av_freep(&avctx->extradata);
+    avctx->codec = NULL;
+    entangled_thread_counter--;
+
+    /* Release any user-supplied mutex. */
+    if (ff_lockmgr_cb) {
+        (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
+    }
+    return 0;
+}
+
+AVCodec *avcodec_find_encoder(enum CodecID id)
+{
+    AVCodec *p, *experimental=NULL;
+    p = first_avcodec;
+    while (p) {
+        if (p->encode != NULL && p->id == id) {
+            if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
+                experimental = p;
+            } else
+                return p;
+        }
+        p = p->next;
+    }
+    return experimental;
+}
+
+AVCodec *avcodec_find_encoder_by_name(const char *name)
+{
+    AVCodec *p;
+    if (!name)
+        return NULL;
+    p = first_avcodec;
+    while (p) {
+        if (p->encode != NULL && strcmp(name,p->name) == 0)
+            return p;
+        p = p->next;
+    }
+    return NULL;
+}
+
+AVCodec *avcodec_find_decoder(enum CodecID id)
+{
+    AVCodec *p;
+    p = first_avcodec;
+    while (p) {
+        if (p->decode != NULL && p->id == id)
+            return p;
+        p = p->next;
+    }
+    return NULL;
+}
+
+AVCodec *avcodec_find_decoder_by_name(const char *name)
+{
+    AVCodec *p;
+    if (!name)
+        return NULL;
+    p = first_avcodec;
+    while (p) {
+        if (p->decode != NULL && strcmp(name,p->name) == 0)
+            return p;
+        p = p->next;
+    }
+    return NULL;
+}
+
+static int get_bit_rate(AVCodecContext *ctx)
+{
+    int bit_rate;
+    int bits_per_sample;
+
+    switch(ctx->codec_type) {
+    case AVMEDIA_TYPE_VIDEO:
+    case AVMEDIA_TYPE_DATA:
+    case AVMEDIA_TYPE_SUBTITLE:
+    case AVMEDIA_TYPE_ATTACHMENT:
+        bit_rate = ctx->bit_rate;
+        break;
+    case AVMEDIA_TYPE_AUDIO:
+        bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
+        bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
+        break;
+    default:
+        bit_rate = 0;
+        break;
+    }
+    return bit_rate;
+}
+
+size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
+{
+    int i, len, ret = 0;
+
+    for (i = 0; i < 4; i++) {
+        len = snprintf(buf, buf_size,
+                       isprint(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF);
+        buf      += len;
+        buf_size  = buf_size > len ? buf_size - len : 0;
+        ret      += len;
+        codec_tag>>=8;
+    }
+    return ret;
+}
+
+void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
+{
+    const char *codec_name;
+    AVCodec *p;
+    char buf1[32];
+    int bitrate;
+    AVRational display_aspect_ratio;
+
+    if (encode)
+        p = avcodec_find_encoder(enc->codec_id);
+    else
+        p = avcodec_find_decoder(enc->codec_id);
+
+    if (p) {
+        codec_name = p->name;
+    } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
+        /* fake mpeg2 transport stream codec (currently not
+           registered) */
+        codec_name = "mpeg2ts";
+    } else if (enc->codec_name[0] != '\0') {
+        codec_name = enc->codec_name;
+    } else {
+        /* output avi tags */
+        char tag_buf[32];
+        av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
+        snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
+        codec_name = buf1;
+    }
+
+    switch(enc->codec_type) {
+    case AVMEDIA_TYPE_VIDEO:
+        snprintf(buf, buf_size,
+                 "Video: %s%s",
+                 codec_name, enc->mb_decision ? " (hq)" : "");
+        if (enc->pix_fmt != PIX_FMT_NONE) {
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", %s",
+                     avcodec_get_pix_fmt_name(enc->pix_fmt));
+        }
+        if (enc->width) {
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", %dx%d",
+                     enc->width, enc->height);
+            if (enc->sample_aspect_ratio.num) {
+                av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
+                          enc->width*enc->sample_aspect_ratio.num,
+                          enc->height*enc->sample_aspect_ratio.den,
+                          1024*1024);
+                snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                         " [PAR %d:%d DAR %d:%d]",
+                         enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
+                         display_aspect_ratio.num, display_aspect_ratio.den);
+            }
+            if(av_log_get_level() >= AV_LOG_DEBUG){
+                int g= av_gcd(enc->time_base.num, enc->time_base.den);
+                snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", %d/%d",
+                     enc->time_base.num/g, enc->time_base.den/g);
+            }
+        }
+        if (encode) {
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", q=%d-%d", enc->qmin, enc->qmax);
+        }
+        break;
+    case AVMEDIA_TYPE_AUDIO:
+        snprintf(buf, buf_size,
+                 "Audio: %s",
+                 codec_name);
+        if (enc->sample_rate) {
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", %d Hz", enc->sample_rate);
+        }
+        av_strlcat(buf, ", ", buf_size);
+        avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
+        if (enc->sample_fmt != SAMPLE_FMT_NONE) {
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
+        }
+        break;
+    case AVMEDIA_TYPE_DATA:
+        snprintf(buf, buf_size, "Data: %s", codec_name);
+        break;
+    case AVMEDIA_TYPE_SUBTITLE:
+        snprintf(buf, buf_size, "Subtitle: %s", codec_name);
+        break;
+    case AVMEDIA_TYPE_ATTACHMENT:
+        snprintf(buf, buf_size, "Attachment: %s", codec_name);
+        break;
+    default:
+        snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
+        return;
+    }
+    if (encode) {
+        if (enc->flags & CODEC_FLAG_PASS1)
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", pass 1");
+        if (enc->flags & CODEC_FLAG_PASS2)
+            snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                     ", pass 2");
+    }
+    bitrate = get_bit_rate(enc);
+    if (bitrate != 0) {
+        snprintf(buf + strlen(buf), buf_size - strlen(buf),
+                 ", %d kb/s", bitrate / 1000);
+    }
+}
+
+unsigned avcodec_version( void )
+{
+  return LIBAVCODEC_VERSION_INT;
+}
+
+const char *avcodec_configuration(void)
+{
+    return FFMPEG_CONFIGURATION;
+}
+
+const char *avcodec_license(void)
+{
+#define LICENSE_PREFIX "libavcodec license: "
+    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
+}
+
+void avcodec_init(void)
+{
+    static int initialized = 0;
+
+    if (initialized != 0)
+        return;
+    initialized = 1;
+
+    dsputil_static_init();
+}
+
+void avcodec_flush_buffers(AVCodecContext *avctx)
+{
+    if(avctx->codec->flush)
+        avctx->codec->flush(avctx);
+}
+
+void avcodec_default_free_buffers(AVCodecContext *s){
+    int i, j;
+
+    if(s->internal_buffer==NULL) return;
+
+    if (s->internal_buffer_count)
+        av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
+    for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
+        InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
+        for(j=0; j<4; j++){
+            av_freep(&buf->base[j]);
+            buf->data[j]= NULL;
+        }
+    }
+    av_freep(&s->internal_buffer);
+
+    s->internal_buffer_count=0;
+}
+
+char av_get_pict_type_char(int pict_type){
+    switch(pict_type){
+    case FF_I_TYPE: return 'I';
+    case FF_P_TYPE: return 'P';
+    case FF_B_TYPE: return 'B';
+    case FF_S_TYPE: return 'S';
+    case FF_SI_TYPE:return 'i';
+    case FF_SP_TYPE:return 'p';
+    case FF_BI_TYPE:return 'b';
+    default:        return '?';
+    }
+}
+
+int av_get_bits_per_sample(enum CodecID codec_id){
+    switch(codec_id){
+    case CODEC_ID_ADPCM_SBPRO_2:
+        return 2;
+    case CODEC_ID_ADPCM_SBPRO_3:
+        return 3;
+    case CODEC_ID_ADPCM_SBPRO_4:
+    case CODEC_ID_ADPCM_CT:
+    case CODEC_ID_ADPCM_IMA_WAV:
+    case CODEC_ID_ADPCM_MS:
+    case CODEC_ID_ADPCM_YAMAHA:
+        return 4;
+    case CODEC_ID_PCM_ALAW:
+    case CODEC_ID_PCM_MULAW:
+    case CODEC_ID_PCM_S8:
+    case CODEC_ID_PCM_U8:
+    case CODEC_ID_PCM_ZORK:
+        return 8;
+    case CODEC_ID_PCM_S16BE:
+    case CODEC_ID_PCM_S16LE:
+    case CODEC_ID_PCM_S16LE_PLANAR:
+    case CODEC_ID_PCM_U16BE:
+    case CODEC_ID_PCM_U16LE:
+        return 16;
+    case CODEC_ID_PCM_S24DAUD:
+    case CODEC_ID_PCM_S24BE:
+    case CODEC_ID_PCM_S24LE:
+    case CODEC_ID_PCM_U24BE:
+    case CODEC_ID_PCM_U24LE:
+        return 24;
+    case CODEC_ID_PCM_S32BE:
+    case CODEC_ID_PCM_S32LE:
+    case CODEC_ID_PCM_U32BE:
+    case CODEC_ID_PCM_U32LE:
+    case CODEC_ID_PCM_F32BE:
+    case CODEC_ID_PCM_F32LE:
+        return 32;
+    case CODEC_ID_PCM_F64BE:
+    case CODEC_ID_PCM_F64LE:
+        return 64;
+    default:
+        return 0;
+    }
+}
+
+int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
+    switch (sample_fmt) {
+    case SAMPLE_FMT_U8:
+        return 8;
+    case SAMPLE_FMT_S16:
+        return 16;
+    case SAMPLE_FMT_S32:
+    case SAMPLE_FMT_FLT:
+        return 32;
+    case SAMPLE_FMT_DBL:
+        return 64;
+    default:
+        return 0;
+    }
+}
+
+#if !HAVE_THREADS
+int avcodec_thread_init(AVCodecContext *s, int thread_count){
+    s->thread_count = thread_count;
+    return -1;
+}
+#endif
+
+unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
+{
+    unsigned int n = 0;
+
+    while(v >= 0xff) {
+        *s++ = 0xff;
+        v -= 0xff;
+        n++;
+    }
+    *s = v;
+    n++;
+    return n;
+}
+
+#if LIBAVCODEC_VERSION_MAJOR < 53
+#include "libavcore/parseutils.h"
+
+int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
+{
+    return av_parse_video_size(width_ptr, height_ptr, str);
+}
+
+int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
+{
+    return av_parse_video_rate(frame_rate, arg);
+}
+#endif
+
+int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
+    int i;
+    for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
+    return i;
+}
+#endif
+
+void av_log_missing_feature(void *avc, const char *feature, int want_sample)
+{
+    av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
+            "version to the newest one from SVN. If the problem still "
+            "occurs, it means that your file has a feature which has not "
+            "been implemented.", feature);
+    if(want_sample)
+        av_log_ask_for_sample(avc, NULL);
+    else
+        av_log(avc, AV_LOG_WARNING, "\n");
+}
+
+void av_log_ask_for_sample(void *avc, const char *msg)
+{
+    if (msg)
+        av_log(avc, AV_LOG_WARNING, "%s ", msg);
+    av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
+            "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
+            "and contact the ffmpeg-devel mailing list.\n");
+}
+#if 0
+static AVHWAccel *first_hwaccel = NULL;
+
+void av_register_hwaccel(AVHWAccel *hwaccel)
+{
+    AVHWAccel **p = &first_hwaccel;
+    while (*p)
+        p = &(*p)->next;
+    *p = hwaccel;
+    hwaccel->next = NULL;
+}
+
+AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
+{
+    return hwaccel ? hwaccel->next : first_hwaccel;
+}
+
+AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
+{
+    AVHWAccel *hwaccel=NULL;
+
+    while((hwaccel= av_hwaccel_next(hwaccel))){
+        if (   hwaccel->id      == codec_id
+            && hwaccel->pix_fmt == pix_fmt)
+            return hwaccel;
+    }
+    return NULL;
+}
+
+int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
+{
+    if (ff_lockmgr_cb) {
+        if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
+            return -1;
+    }
+
+    ff_lockmgr_cb = cb;
+
+    if (ff_lockmgr_cb) {
+        if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
+            return -1;
+    }
+    return 0;
+}
+
+unsigned int ff_toupper4(unsigned int x)
+{
+    return     toupper( x     &0xFF)
+            + (toupper((x>>8 )&0xFF)<<8 )
+            + (toupper((x>>16)&0xFF)<<16)
+            + (toupper((x>>24)&0xFF)<<24);
+}
+#endif