41 int chroma_w, chroma_h;
42 int shift_slice_position;
50 shift_slice_position = -((-slice_position) >> pix_fmt_desc->
log2_chroma_h);
57 for (
i = 0;
i < chroma_h;
i++) {
61 for (
i = 0;
i < chroma_h;
i++) {
62 memcpy(
slice_byte_buffer +
ctx->width *
ctx->height + chroma_w * shift_height + chroma_w * shift_slice_position +
i * chroma_w,
76 int number_of_written_bytes;
122 ctx->thread_count = 1;
142 if (strcmp(codec->
name,
"flv") && strcmp(codec->
name,
"mpeg4") && strcmp(codec->
name,
"huffyuv")) {
148 byte_buffer =
av_malloc(byte_buffer_size);
163 while (result >= 0) {
180 while (result >= 0) {
184 else if (result ==
AVERROR(EAGAIN)) {
187 }
else if (result < 0) {
194 ctx->pix_fmt,
ctx->width,
ctx->height, 1);
195 if (number_of_written_bytes < 0) {
197 return number_of_written_bytes;
222 int main(
int argc,
char **argv)
226 av_log(
NULL,
AV_LOG_ERROR,
"Incorrect input: expected %s <name of a video file>\nNote that test works only for huffyuv, flv and mpeg4 decoders\n", argv[0]);
Public header for Adler-32 hash function implementation.
uint8_t * slice_byte_buffer
draw_horiz_band test.
int draw_horiz_band_called
static int video_decode(const char *input_filename)
int main(int argc, char **argv)
static void draw_horiz_band(AVCodecContext *ctx, const AVFrame *fr, int offset[4], int slice_position, int type, int height)
uint8_t slice_byte_buffer_size
Libavcodec external API header.
static AVFormatContext * fmt_ctx
static AVStream * video_stream
static const char * input_filename
int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
int avcodec_parameters_to_context(AVCodecContext *codec, const AVCodecParameters *par)
Fill the codec context based on the values from the supplied codec parameters.
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
void avcodec_free_context(AVCodecContext **avctx)
Free the codec context and everything associated with it and write NULL to the provided pointer.
int avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
Return decoded output data from a decoder.
int avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
Supply raw packet data as input to a decoder.
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type, int wanted_stream_nb, int related_stream, AVCodec **decoder_ret, int flags)
Find the "best" stream in the file.
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
int avformat_open_input(AVFormatContext **ps, const char *url, ff_const59 AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf, unsigned int len)
Calculate the Adler32 checksum of a buffer.
#define AVERROR_EOF
End of file.
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align)
Return the size in bytes of the amount of data required to store an image with the given parameters.
int av_image_copy_to_buffer(uint8_t *dst, int dst_size, const uint8_t *const src_data[4], const int src_linesize[4], enum AVPixelFormat pix_fmt, int width, int height, int align)
Copy image data from an image into a buffer.
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
main external API structure.
This struct describes the properties of an encoded stream.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
const char * name
Name of the codec implementation.
AVStream ** streams
A list of all streams in the file.
This structure describes decoded (raw) audio or video data.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
This structure stores compressed data.
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
static const uint8_t offset[127][2]