void DecodeVideo2(const char *outfilename, const char *filename)
{
/* must be called before using avcodec lib */
avcodec_register_all();
FILE* outFile = fopen(outfilename, "wb");
if (outFile)
{
__android_log_write(ANDROID_LOG_DEBUG, "jni_test", "out file exists");
fclose(outFile);
}
__android_log_write(ANDROID_LOG_DEBUG, "jni_test", "Decode video file start.....");
AVCodec *codec;
AVCodecContext *c= NULL;
int frame_count;
FILE *f;
AVFrame *frame;
uint8_t inbuf[INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
AVPacket avpkt;
av_init_packet(&avpkt);
/* set end of buffer to 0 (this ensures that no overreading happens for damaged mpeg streams) */
memset(inbuf + INBUF_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
ANN_DEBUG
printf("Decode video file %s to %s\n", filename, outfilename);
sprintf(msg, "Decode video file %s to %s\n", filename, outfilename);
__android_log_write(ANDROID_LOG_DEBUG, "jni_test", msg);
ANN_DEBUG
/* find the mpeg1 video decoder */
codec = avcodec_find_decoder(AV_CODEC_ID_H264);
ANN_DEBUG
if (!codec) {
ANN_DEBUG
sprintf(msg, "Codec not found\n");
__android_log_write(ANDROID_LOG_DEBUG, "jni_test", msg);
fprintf(stderr, "Codec not found\n");
exit(1);
}
ANN_DEBUG
c = avcodec_alloc_context3(codec);
if (!c) {
fprintf(stderr, "Could not allocate video codec context\n");
exit(1);
}
ANN_DEBUG
sprintf(msg, "truncated is removed\n");
__android_log_write(ANDROID_LOG_DEBUG, "jni_test", msg);
/* if(codec->capabilities&CODEC_CAP_TRUNCATED)
c->flags|= CODEC_FLAG_TRUNCATED; */
/* we do not send complete frames */
/* For some codecs, such as msmpeg4 and mpeg4, width and height
MUST be initialized there because this information is not
available in the bitstream. */
/* open it */
ANN_DEBUG
if (avcodec_open2(c, codec, NULL) < 0) {
fprintf(stderr, "Could not open codec\n");
exit(1);
}
ANN_DEBUG
f = fopen(filename, "rb");
if (!f) {
fprintf(stderr, "Could not open %s\n", filename);
exit(1);
}
ANN_DEBUG
frame = av_frame_alloc();
if (!frame) {
fprintf(stderr, "Could not allocate video frame\n");
exit(1);
}
ANN_DEBUG
__android_log_write(ANDROID_LOG_DEBUG, "jni_test", msg);
for (;;) {
ANN_DEBUG
avpkt.size = fread(inbuf, 1, INBUF_SIZE, f);
sprintf(msg, "avpkt.size = %d, inbuf=0x%x _____ %x\n", avpkt.size, inbuf[0], inbuf[1]);
if (avpkt.size == 0)
break;
__android_log_write(ANDROID_LOG_DEBUG, "jni_test", msg);
/* NOTE1: some codecs are stream based (mpegvideo, mpegaudio)
and this is the only method to use them because you cannot
know the compressed data size before analysing it.
BUT some other codecs (msmpeg4, mpeg4) are inherently frame
based, so you must call them with all the data for one
frame exactly. You must also initialize 'width' and
'height' before initializing them. */
/* NOTE2: some codecs allow the raw parameters (frame size,
sample rate) to be changed at any frame. We handle this, so
you should also take care of it */
/* here, we use a stream based decoder (mpeg1video), so we
feed decoder and see if it could decode a frame */
avpkt.data = inbuf;
ANN_DEBUG
while (avpkt.size > 0)
{
if (decode_write_frame(outfilename, c, frame, &frame_count, &avpkt, 0) < 0)
{
sprintf(msg, "fail to write decode frame\n");
__android_log_write(ANDROID_LOG_DEBUG, "jni_test", msg);
exit(1);
}
sprintf(msg, "%d avpkt.size = %d, frame_count = %d\n", __LINE__, avpkt.size, frame_count);
__android_log_write(ANDROID_LOG_DEBUG, "jni_test", msg);
}
}
/* some codecs, such as MPEG, transmit the I and P frame with a
latency of one frame. You must do the following to have a
chance to get the last frame of the video */
ANN_DEBUG
avpkt.data = NULL;
avpkt.size = 0;
decode_write_frame(outfilename, c, frame, &frame_count, &avpkt, 1);
ANN_DEBUG
fclose(f);
avcodec_close(c);
av_free(c);
av_frame_free(&frame);
printf("\n");
sprintf(msg, "decode done\n");
__android_log_write(ANDROID_LOG_DEBUG, "jni_test", msg);
}
static void video_decode_example(const char *outfilename, const char *filename)
{
AVCodec *codec;
AVCodecContext *c= NULL;
int frame_count;
FILE *f;
AVFrame *frame;
uint8_t inbuf[INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
AVPacket avpkt;
av_init_packet(&avpkt);
/* set end of buffer to 0 (this ensures that no overreading happens for damaged mpeg streams) */
memset(inbuf + INBUF_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
printf("Decode video file %s to %s\n", filename, outfilename);
/* find the mpeg1 video decoder */
codec = avcodec_find_decoder(AV_CODEC_ID_MPEG1VIDEO);
if (!codec) {
fprintf(stderr, "Codec not found\n");
exit(1);
}
c = avcodec_alloc_context3(codec);
if (!c) {
fprintf(stderr, "Could not allocate video codec context\n");
exit(1);
}
if(codec->capabilities&CODEC_CAP_TRUNCATED)
c->flags|= CODEC_FLAG_TRUNCATED; /* we do not send complete frames */
/* For some codecs, such as msmpeg4 and mpeg4, width and height
MUST be initialized there because this information is not
available in the bitstream. */
/* open it */
if (avcodec_open2(c, codec, NULL) < 0) {
fprintf(stderr, "Could not open codec\n");
exit(1);
}
f = fopen(filename, "rb");
if (!f) {
fprintf(stderr, "Could not open %s\n", filename);
exit(1);
}
frame = avcodec_alloc_frame();
if (!frame) {
fprintf(stderr, "Could not allocate video frame\n");
exit(1);
}
frame_count = 0;
for(;;) {
avpkt.size = fread(inbuf, 1, INBUF_SIZE, f);
if (avpkt.size == 0)
break;
/* NOTE1: some codecs are stream based (mpegvideo, mpegaudio)
and this is the only method to use them because you cannot
know the compressed data size before analysing it.
BUT some other codecs (msmpeg4, mpeg4) are inherently frame
based, so you must call them with all the data for one
frame exactly. You must also initialize 'width' and
'height' before initializing them. */
/* NOTE2: some codecs allow the raw parameters (frame size,
sample rate) to be changed at any frame. We handle this, so
you should also take care of it */
/* here, we use a stream based decoder (mpeg1video), so we
feed decoder and see if it could decode a frame */
avpkt.data = inbuf;
while (avpkt.size > 0)
if (decode_write_frame(outfilename, c, frame, &frame_count, &avpkt, 0) < 0)
exit(1);
}
/* some codecs, such as MPEG, transmit the I and P frame with a
latency of one frame. You must do the following to have a
chance to get the last frame of the video */
avpkt.data = NULL;
avpkt.size = 0;
decode_write_frame(outfilename, c, frame, &frame_count, &avpkt, 1);
fclose(f);
avcodec_close(c);
av_free(c);
avcodec_free_frame(&frame);
printf("\n");
}
