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add y4m support to vp9 example encoders.

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vp9_spatial_svc_encoder and vpx_temporal_svc_encoder.

Change-Id: I8dfa1dfad83c83a26ddac4e7c57b5f1ff161e588
This commit is contained in:
Jerome Jiang
2019-01-28 15:49:42 -08:00
parent 5e5f6db657
commit 7199f78783
8 changed files with 166 additions and 108 deletions
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14
examples.mk
View File

@@ -72,6 +72,7 @@ vpxdec.SRCS += vpx_ports/vpx_timer.h
vpxdec.SRCS += vpx/vpx_integer.h
vpxdec.SRCS += args.c args.h
vpxdec.SRCS += ivfdec.c ivfdec.h
vpxdec.SRCS += y4minput.c y4minput.h
vpxdec.SRCS += tools_common.c tools_common.h
vpxdec.SRCS += y4menc.c y4menc.h
ifeq ($(CONFIG_LIBYUV),yes)
@@ -113,6 +114,7 @@ vpxenc.DESCRIPTION = Full featured encoder
EXAMPLES-$(CONFIG_VP9_ENCODER) += vp9_spatial_svc_encoder.c
vp9_spatial_svc_encoder.SRCS += args.c args.h
vp9_spatial_svc_encoder.SRCS += ivfenc.c ivfenc.h
vp9_spatial_svc_encoder.SRCS += y4minput.c y4minput.h
vp9_spatial_svc_encoder.SRCS += tools_common.c tools_common.h
vp9_spatial_svc_encoder.SRCS += video_common.h
vp9_spatial_svc_encoder.SRCS += video_writer.h video_writer.c
@@ -129,6 +131,7 @@ endif
EXAMPLES-$(CONFIG_ENCODERS) += vpx_temporal_svc_encoder.c
vpx_temporal_svc_encoder.SRCS += ivfenc.c ivfenc.h
vpx_temporal_svc_encoder.SRCS += y4minput.c y4minput.h
vpx_temporal_svc_encoder.SRCS += tools_common.c tools_common.h
vpx_temporal_svc_encoder.SRCS += video_common.h
vpx_temporal_svc_encoder.SRCS += video_writer.h video_writer.c
@@ -138,6 +141,7 @@ vpx_temporal_svc_encoder.DESCRIPTION = Temporal SVC Encoder
EXAMPLES-$(CONFIG_DECODERS) += simple_decoder.c
simple_decoder.GUID = D3BBF1E9-2427-450D-BBFF-B2843C1D44CC
simple_decoder.SRCS += ivfdec.h ivfdec.c
simple_decoder.SRCS += y4minput.c y4minput.h
simple_decoder.SRCS += tools_common.h tools_common.c
simple_decoder.SRCS += video_common.h
simple_decoder.SRCS += video_reader.h video_reader.c
@@ -147,6 +151,7 @@ simple_decoder.SRCS += vpx_ports/msvc.h
simple_decoder.DESCRIPTION = Simplified decoder loop
EXAMPLES-$(CONFIG_DECODERS) += postproc.c
postproc.SRCS += ivfdec.h ivfdec.c
postproc.SRCS += y4minput.c y4minput.h
postproc.SRCS += tools_common.h tools_common.c
postproc.SRCS += video_common.h
postproc.SRCS += video_reader.h video_reader.c
@@ -158,6 +163,7 @@ postproc.DESCRIPTION = Decoder postprocessor control
EXAMPLES-$(CONFIG_DECODERS) += decode_to_md5.c
decode_to_md5.SRCS += md5_utils.h md5_utils.c
decode_to_md5.SRCS += ivfdec.h ivfdec.c
decode_to_md5.SRCS += y4minput.c y4minput.h
decode_to_md5.SRCS += tools_common.h tools_common.c
decode_to_md5.SRCS += video_common.h
decode_to_md5.SRCS += video_reader.h video_reader.c
@@ -168,6 +174,7 @@ decode_to_md5.GUID = 59120B9B-2735-4BFE-B022-146CA340FE42
decode_to_md5.DESCRIPTION = Frame by frame MD5 checksum
EXAMPLES-$(CONFIG_ENCODERS) += simple_encoder.c
simple_encoder.SRCS += ivfenc.h ivfenc.c
simple_encoder.SRCS += y4minput.c y4minput.h
simple_encoder.SRCS += tools_common.h tools_common.c
simple_encoder.SRCS += video_common.h
simple_encoder.SRCS += video_writer.h video_writer.c
@@ -176,6 +183,7 @@ simple_encoder.GUID = 4607D299-8A71-4D2C-9B1D-071899B6FBFD
simple_encoder.DESCRIPTION = Simplified encoder loop
EXAMPLES-$(CONFIG_VP9_ENCODER) += vp9_lossless_encoder.c
vp9_lossless_encoder.SRCS += ivfenc.h ivfenc.c
vp9_lossless_encoder.SRCS += y4minput.c y4minput.h
vp9_lossless_encoder.SRCS += tools_common.h tools_common.c
vp9_lossless_encoder.SRCS += video_common.h
vp9_lossless_encoder.SRCS += video_writer.h video_writer.c
@@ -184,6 +192,7 @@ vp9_lossless_encoder.GUID = B63C7C88-5348-46DC-A5A6-CC151EF93366
vp9_lossless_encoder.DESCRIPTION = Simplified lossless VP9 encoder
EXAMPLES-$(CONFIG_ENCODERS) += twopass_encoder.c
twopass_encoder.SRCS += ivfenc.h ivfenc.c
twopass_encoder.SRCS += y4minput.c y4minput.h
twopass_encoder.SRCS += tools_common.h tools_common.c
twopass_encoder.SRCS += video_common.h
twopass_encoder.SRCS += video_writer.h video_writer.c
@@ -192,6 +201,7 @@ twopass_encoder.GUID = 73494FA6-4AF9-4763-8FBB-265C92402FD8
twopass_encoder.DESCRIPTION = Two-pass encoder loop
EXAMPLES-$(CONFIG_DECODERS) += decode_with_drops.c
decode_with_drops.SRCS += ivfdec.h ivfdec.c
decode_with_drops.SRCS += y4minput.c y4minput.h
decode_with_drops.SRCS += tools_common.h tools_common.c
decode_with_drops.SRCS += video_common.h
decode_with_drops.SRCS += video_reader.h video_reader.c
@@ -202,6 +212,7 @@ decode_with_drops.GUID = CE5C53C4-8DDA-438A-86ED-0DDD3CDB8D26
decode_with_drops.DESCRIPTION = Drops frames while decoding
EXAMPLES-$(CONFIG_ENCODERS) += set_maps.c
set_maps.SRCS += ivfenc.h ivfenc.c
set_maps.SRCS += y4minput.c y4minput.h
set_maps.SRCS += tools_common.h tools_common.c
set_maps.SRCS += video_common.h
set_maps.SRCS += video_writer.h video_writer.c
@@ -210,6 +221,7 @@ set_maps.GUID = ECB2D24D-98B8-4015-A465-A4AF3DCC145F
set_maps.DESCRIPTION = Set active and ROI maps
EXAMPLES-$(CONFIG_VP8_ENCODER) += vp8cx_set_ref.c
vp8cx_set_ref.SRCS += ivfenc.h ivfenc.c
vp8cx_set_ref.SRCS += y4minput.c y4minput.h
vp8cx_set_ref.SRCS += tools_common.h tools_common.c
vp8cx_set_ref.SRCS += video_common.h
vp8cx_set_ref.SRCS += video_writer.h video_writer.c
@@ -221,6 +233,7 @@ ifeq ($(CONFIG_VP9_ENCODER),yes)
ifeq ($(CONFIG_DECODERS),yes)
EXAMPLES-yes += vp9cx_set_ref.c
vp9cx_set_ref.SRCS += ivfenc.h ivfenc.c
vp9cx_set_ref.SRCS += y4minput.c y4minput.h
vp9cx_set_ref.SRCS += tools_common.h tools_common.c
vp9cx_set_ref.SRCS += video_common.h
vp9cx_set_ref.SRCS += video_writer.h video_writer.c
@@ -233,6 +246,7 @@ ifeq ($(CONFIG_MULTI_RES_ENCODING),yes)
ifeq ($(CONFIG_LIBYUV),yes)
EXAMPLES-$(CONFIG_VP8_ENCODER) += vp8_multi_resolution_encoder.c
vp8_multi_resolution_encoder.SRCS += ivfenc.h ivfenc.c
vp8_multi_resolution_encoder.SRCS += y4minput.c y4minput.h
vp8_multi_resolution_encoder.SRCS += tools_common.h tools_common.c
vp8_multi_resolution_encoder.SRCS += video_writer.h video_writer.c
vp8_multi_resolution_encoder.SRCS += vpx_ports/msvc.h

8
examples/vp8_multi_resolution_encoder.c
View File

@@ -61,7 +61,7 @@ void usage_exit(void) { exit(EXIT_FAILURE); }
int (*read_frame_p)(FILE *f, vpx_image_t *img);
static int read_frame(FILE *f, vpx_image_t *img) {
static int mulres_read_frame(FILE *f, vpx_image_t *img) {
size_t nbytes, to_read;
int res = 1;
@@ -75,7 +75,7 @@ static int read_frame(FILE *f, vpx_image_t *img) {
return res;
}
static int read_frame_by_row(FILE *f, vpx_image_t *img) {
static int mulres_read_frame_by_row(FILE *f, vpx_image_t *img) {
size_t nbytes, to_read;
int res = 1;
int plane;
@@ -471,9 +471,9 @@ int main(int argc, char **argv) {
die("Failed to allocate image", cfg[i].g_w, cfg[i].g_h);
if (raw[0].stride[VPX_PLANE_Y] == (int)raw[0].d_w)
read_frame_p = read_frame;
read_frame_p = mulres_read_frame;
else
read_frame_p = read_frame_by_row;
read_frame_p = mulres_read_frame_by_row;
for (i = 0; i < NUM_ENCODERS; i++)
if (outfile[i]) write_ivf_file_header(outfile[i], &cfg[i], 0);

32
examples/vp9_spatial_svc_encoder.c
View File

@@ -30,6 +30,8 @@
#include "vpx/vpx_encoder.h"
#include "../vpxstats.h"
#include "vp9/encoder/vp9_encoder.h"
#include "./y4minput.h"
#define OUTPUT_RC_STATS 1
static const arg_def_t skip_frames_arg =
@@ -161,7 +163,6 @@ static const int32_t default_speed = -1; // -1 means use library default.
static const uint32_t default_threads = 0; // zero means use library default.
typedef struct {
const char *input_filename;
const char *output_filename;
uint32_t frames_to_code;
uint32_t frames_to_skip;
@@ -393,10 +394,16 @@ static void parse_command_line(int argc, const char **argv_,
if (argv[0] == NULL || argv[1] == 0) {
usage_exit();
}
app_input->input_filename = argv[0];
app_input->input_ctx.filename = argv[0];
app_input->output_filename = argv[1];
free(argv);
open_input_file(&app_input->input_ctx);
if (app_input->input_ctx.file_type == FILE_TYPE_Y4M) {
enc_cfg->g_w = app_input->input_ctx.width;
enc_cfg->g_h = app_input->input_ctx.height;
}
if (enc_cfg->g_w < 16 || enc_cfg->g_w % 2 || enc_cfg->g_h < 16 ||
enc_cfg->g_h % 2)
die("Invalid resolution: %d x %d\n", enc_cfg->g_w, enc_cfg->g_h);
@@ -752,7 +759,6 @@ int main(int argc, const char **argv) {
vpx_codec_err_t res;
int pts = 0; /* PTS starts at 0 */
int frame_duration = 1; /* 1 timebase tick per frame */
FILE *infile = NULL;
int end_of_stream = 0;
int frames_received = 0;
#if OUTPUT_RC_STATS
@@ -773,6 +779,13 @@ int main(int argc, const char **argv) {
memset(&layer_id, 0, sizeof(vpx_svc_layer_id_t));
memset(&rc, 0, sizeof(struct RateControlStats));
exec_name = argv[0];
/* Setup default input stream settings */
app_input.input_ctx.framerate.numerator = 30;
app_input.input_ctx.framerate.denominator = 1;
app_input.input_ctx.only_i420 = 1;
app_input.input_ctx.bit_depth = 0;
parse_command_line(argc, argv, &app_input, &svc_ctx, &enc_cfg);
// Allocate image buffer
@@ -789,9 +802,6 @@ int main(int argc, const char **argv) {
}
#endif // CONFIG_VP9_HIGHBITDEPTH
if (!(infile = fopen(app_input.input_filename, "rb")))
die("Failed to open %s for reading\n", app_input.input_filename);
// Initialize codec
if (vpx_svc_init(&svc_ctx, &codec, vpx_codec_vp9_cx(), &enc_cfg) !=
VPX_CODEC_OK)
@@ -835,7 +845,8 @@ int main(int argc, const char **argv) {
#endif
// skip initial frames
for (i = 0; i < app_input.frames_to_skip; ++i) vpx_img_read(&raw, infile);
for (i = 0; i < app_input.frames_to_skip; ++i)
read_frame(&app_input.input_ctx, &raw);
if (svc_ctx.speed != -1)
vpx_codec_control(&codec, VP8E_SET_CPUUSED, svc_ctx.speed);
@@ -875,7 +886,8 @@ int main(int argc, const char **argv) {
// layers, with SL0 only has TL0, and SL1 has both TL0 and TL1. This example
// uses the extended API.
int example_pattern = 0;
if (frame_cnt >= app_input.frames_to_code || !vpx_img_read(&raw, infile)) {
if (frame_cnt >= app_input.frames_to_code ||
!read_frame(&app_input.input_ctx, &raw)) {
// We need one extra vpx_svc_encode call at end of stream to flush
// encoder and get remaining data
end_of_stream = 1;
@@ -1091,7 +1103,9 @@ int main(int argc, const char **argv) {
}
printf("Processed %d frames\n", frame_cnt);
fclose(infile);
close_input_file(&app_input.input_ctx);
#if OUTPUT_RC_STATS
if (svc_ctx.output_rc_stat) {
printout_rate_control_summary(&rc, &enc_cfg, frame_cnt);

29
examples/vpx_temporal_svc_encoder.c
View File

@@ -19,6 +19,7 @@
#include <string.h>
#include "./vpx_config.h"
#include "./y4minput.h"
#include "../vpx_ports/vpx_timer.h"
#include "vpx/vp8cx.h"
#include "vpx/vpx_encoder.h"
@@ -594,7 +595,7 @@ int main(int argc, char **argv) {
#endif
vpx_svc_layer_id_t layer_id;
const VpxInterface *encoder = NULL;
FILE *infile = NULL;
struct VpxInputContext input_ctx;
struct RateControlMetrics rc;
int64_t cx_time = 0;
const int min_args_base = 13;
@@ -611,6 +612,13 @@ int main(int argc, char **argv) {
zero(rc.layer_target_bitrate);
memset(&layer_id, 0, sizeof(vpx_svc_layer_id_t));
memset(&input_ctx, 0, sizeof(input_ctx));
/* Setup default input stream settings */
input_ctx.framerate.numerator = 30;
input_ctx.framerate.denominator = 1;
input_ctx.only_i420 = 1;
input_ctx.bit_depth = 0;
exec_name = argv[0];
// Check usage and arguments.
if (argc < min_args) {
@@ -754,9 +762,18 @@ int main(int argc, char **argv) {
// Set to layer_target_bitrate for highest layer (total bitrate).
cfg.rc_target_bitrate = rc.layer_target_bitrate[cfg.ts_number_layers - 1];
// Open input file.
if (!(infile = fopen(argv[1], "rb"))) {
die("Failed to open %s for reading", argv[1]);
input_ctx.filename = argv[1];
open_input_file(&input_ctx);
if (input_ctx.file_type == FILE_TYPE_Y4M) {
if (input_ctx.width != cfg.g_w || input_ctx.height != cfg.g_h) {
die("Incorrect width or height: %d x %d", cfg.g_w, cfg.g_h);
}
if (input_ctx.framerate.numerator != cfg.g_timebase.den ||
input_ctx.framerate.denominator != cfg.g_timebase.num) {
die("Incorrect framerate: numerator %d denominator %d",
cfg.g_timebase.num, cfg.g_timebase.den);
}
}
framerate = cfg.g_timebase.den / cfg.g_timebase.num;
@@ -865,7 +882,7 @@ int main(int argc, char **argv) {
}
flags = layer_flags[frame_cnt % flag_periodicity];
if (layering_mode == 0) flags = 0;
frame_avail = vpx_img_read(&raw, infile);
frame_avail = read_frame(&input_ctx, &raw);
if (frame_avail) ++rc.layer_input_frames[layer_id.temporal_layer_id];
vpx_usec_timer_start(&timer);
if (vpx_codec_encode(&codec, frame_avail ? &raw : NULL, pts, 1, flags,
@@ -933,7 +950,7 @@ int main(int argc, char **argv) {
++frame_cnt;
pts += frame_duration;
}
fclose(infile);
close_input_file(&input_ctx);
printout_rate_control_summary(&rc, &cfg, frame_cnt);
printf("\n");
printf("Frame cnt and encoding time/FPS stats for encoding: %d %f %f \n",

90
tools_common.c
View File

@@ -46,6 +46,14 @@
va_end(ap); \
} while (0)
#if CONFIG_ENCODERS
/* Swallow warnings about unused results of fread/fwrite */
static size_t wrap_fread(void *ptr, size_t size, size_t nmemb, FILE *stream) {
return fread(ptr, size, nmemb, stream);
}
#define fread wrap_fread
#endif
FILE *set_binary_mode(FILE *stream) {
(void)stream;
#if defined(_WIN32) || defined(__OS2__)
@@ -264,6 +272,88 @@ double sse_to_psnr(double samples, double peak, double sse) {
}
}
#if CONFIG_ENCODERS
int read_frame(struct VpxInputContext *input_ctx, vpx_image_t *img) {
FILE *f = input_ctx->file;
y4m_input *y4m = &input_ctx->y4m;
int shortread = 0;
if (input_ctx->file_type == FILE_TYPE_Y4M) {
if (y4m_input_fetch_frame(y4m, f, img) < 1) return 0;
} else {
shortread = read_yuv_frame(input_ctx, img);
}
return !shortread;
}
int file_is_y4m(const char detect[4]) {
if (memcmp(detect, "YUV4", 4) == 0) {
return 1;
}
return 0;
}
int fourcc_is_ivf(const char detect[4]) {
if (memcmp(detect, "DKIF", 4) == 0) {
return 1;
}
return 0;
}
void open_input_file(struct VpxInputContext *input) {
/* Parse certain options from the input file, if possible */
input->file = strcmp(input->filename, "-") ? fopen(input->filename, "rb")
: set_binary_mode(stdin);
if (!input->file) fatal("Failed to open input file");
if (!fseeko(input->file, 0, SEEK_END)) {
/* Input file is seekable. Figure out how long it is, so we can get
* progress info.
*/
input->length = ftello(input->file);
rewind(input->file);
}
/* Default to 1:1 pixel aspect ratio. */
input->pixel_aspect_ratio.numerator = 1;
input->pixel_aspect_ratio.denominator = 1;
/* For RAW input sources, these bytes will applied on the first frame
* in read_frame().
*/
input->detect.buf_read = fread(input->detect.buf, 1, 4, input->file);
input->detect.position = 0;
if (input->detect.buf_read == 4 && file_is_y4m(input->detect.buf)) {
if (y4m_input_open(&input->y4m, input->file, input->detect.buf, 4,
input->only_i420) >= 0) {
input->file_type = FILE_TYPE_Y4M;
input->width = input->y4m.pic_w;
input->height = input->y4m.pic_h;
input->pixel_aspect_ratio.numerator = input->y4m.par_n;
input->pixel_aspect_ratio.denominator = input->y4m.par_d;
input->framerate.numerator = input->y4m.fps_n;
input->framerate.denominator = input->y4m.fps_d;
input->fmt = input->y4m.vpx_fmt;
input->bit_depth = input->y4m.bit_depth;
} else {
fatal("Unsupported Y4M stream.");
}
} else if (input->detect.buf_read == 4 && fourcc_is_ivf(input->detect.buf)) {
fatal("IVF is not supported as input.");
} else {
input->file_type = FILE_TYPE_RAW;
}
}
void close_input_file(struct VpxInputContext *input) {
fclose(input->file);
if (input->file_type == FILE_TYPE_Y4M) y4m_input_close(&input->y4m);
}
#endif
// TODO(debargha): Consolidate the functions below into a separate file.
#if CONFIG_VP9_HIGHBITDEPTH
static void highbd_img_upshift(vpx_image_t *dst, vpx_image_t *src,

8
tools_common.h
View File

@@ -152,6 +152,14 @@ int vpx_img_read(vpx_image_t *img, FILE *file);
double sse_to_psnr(double samples, double peak, double mse);
#if CONFIG_ENCODERS
int read_frame(struct VpxInputContext *input_ctx, vpx_image_t *img);
int file_is_y4m(const char detect[4]);
int fourcc_is_ivf(const char detect[4]);
void open_input_file(struct VpxInputContext *input);
void close_input_file(struct VpxInputContext *input);
#endif
#if CONFIG_VP9_HIGHBITDEPTH
void vpx_img_upshift(vpx_image_t *dst, vpx_image_t *src, int input_shift);
void vpx_img_downshift(vpx_image_t *dst, vpx_image_t *src, int down_shift);

6
vpxdec.c
View File

@@ -265,7 +265,7 @@ static int raw_read_frame(FILE *infile, uint8_t **buffer, size_t *bytes_read,
return 1;
}
static int read_frame(struct VpxDecInputContext *input, uint8_t **buf,
static int dec_read_frame(struct VpxDecInputContext *input, uint8_t **buf,
size_t *bytes_in_buffer, size_t *buffer_size) {
switch (input->vpx_input_ctx->file_type) {
#if CONFIG_WEBM_IO
@@ -806,7 +806,7 @@ static int main_loop(int argc, const char **argv_) {
if (arg_skip) fprintf(stderr, "Skipping first %d frames.\n", arg_skip);
while (arg_skip) {
if (read_frame(&input, &buf, &bytes_in_buffer, &buffer_size)) break;
if (dec_read_frame(&input, &buf, &bytes_in_buffer, &buffer_size)) break;
arg_skip--;
}
@@ -837,7 +837,7 @@ static int main_loop(int argc, const char **argv_) {
frame_avail = 0;
if (!stop_after || frame_in < stop_after) {
if (!read_frame(&input, &buf, &bytes_in_buffer, &buffer_size)) {
if (!dec_read_frame(&input, &buf, &bytes_in_buffer, &buffer_size)) {
frame_avail = 1;
frame_in++;

85
vpxenc.c
View File

@@ -50,12 +50,6 @@
#endif
#include "./y4minput.h"
/* Swallow warnings about unused results of fread/fwrite */
static size_t wrap_fread(void *ptr, size_t size, size_t nmemb, FILE *stream) {
return fread(ptr, size, nmemb, stream);
}
#define fread wrap_fread
static size_t wrap_fwrite(const void *ptr, size_t size, size_t nmemb,
FILE *stream) {
return fwrite(ptr, size, nmemb, stream);
@@ -95,34 +89,6 @@ static void warn_or_exit_on_error(vpx_codec_ctx_t *ctx, int fatal,
va_end(ap);
}
static int read_frame(struct VpxInputContext *input_ctx, vpx_image_t *img) {
FILE *f = input_ctx->file;
y4m_input *y4m = &input_ctx->y4m;
int shortread = 0;
if (input_ctx->file_type == FILE_TYPE_Y4M) {
if (y4m_input_fetch_frame(y4m, f, img) < 1) return 0;
} else {
shortread = read_yuv_frame(input_ctx, img);
}
return !shortread;
}
static int file_is_y4m(const char detect[4]) {
if (memcmp(detect, "YUV4", 4) == 0) {
return 1;
}
return 0;
}
static int fourcc_is_ivf(const char detect[4]) {
if (memcmp(detect, "DKIF", 4) == 0) {
return 1;
}
return 0;
}
static const arg_def_t help =
ARG_DEF(NULL, "help", 0, "Show usage options and exit");
static const arg_def_t debugmode =
@@ -1020,57 +986,6 @@ static void parse_global_config(struct VpxEncoderConfig *global, char **argv) {
}
}
static void open_input_file(struct VpxInputContext *input) {
/* Parse certain options from the input file, if possible */
input->file = strcmp(input->filename, "-") ? fopen(input->filename, "rb")
: set_binary_mode(stdin);
if (!input->file) fatal("Failed to open input file");
if (!fseeko(input->file, 0, SEEK_END)) {
/* Input file is seekable. Figure out how long it is, so we can get
* progress info.
*/
input->length = ftello(input->file);
rewind(input->file);
}
/* Default to 1:1 pixel aspect ratio. */
input->pixel_aspect_ratio.numerator = 1;
input->pixel_aspect_ratio.denominator = 1;
/* For RAW input sources, these bytes will applied on the first frame
* in read_frame().
*/
input->detect.buf_read = fread(input->detect.buf, 1, 4, input->file);
input->detect.position = 0;
if (input->detect.buf_read == 4 && file_is_y4m(input->detect.buf)) {
if (y4m_input_open(&input->y4m, input->file, input->detect.buf, 4,
input->only_i420) >= 0) {
input->file_type = FILE_TYPE_Y4M;
input->width = input->y4m.pic_w;
input->height = input->y4m.pic_h;
input->pixel_aspect_ratio.numerator = input->y4m.par_n;
input->pixel_aspect_ratio.denominator = input->y4m.par_d;
input->framerate.numerator = input->y4m.fps_n;
input->framerate.denominator = input->y4m.fps_d;
input->fmt = input->y4m.vpx_fmt;
input->bit_depth = input->y4m.bit_depth;
} else
fatal("Unsupported Y4M stream.");
} else if (input->detect.buf_read == 4 && fourcc_is_ivf(input->detect.buf)) {
fatal("IVF is not supported as input.");
} else {
input->file_type = FILE_TYPE_RAW;
}
}
static void close_input_file(struct VpxInputContext *input) {
fclose(input->file);
if (input->file_type == FILE_TYPE_Y4M) y4m_input_close(&input->y4m);
}
static struct stream_state *new_stream(struct VpxEncoderConfig *global,
struct stream_state *prev) {
struct stream_state *stream;