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Code Issues Releases Activity

avcodec/h261enc: Store the H.261 format value

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Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2022-10-02 22:00:01 +02:00
parent d74ca6fdb4
commit 4e26bd7ad7
2 changed files with 15 additions and 25 deletions
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39
libavcodec/h261enc.c
View File

@ -46,25 +46,16 @@ typedef struct H261EncContext {
H261Context common;
int gob_number;
enum {
H261_QCIF = 0,
H261_CIF = 1,
} format;
} H261EncContext;
int ff_h261_get_picture_format(int width, int height)
{
// QCIF
if (width == 176 && height == 144)
return 0;
// CIF
else if (width == 352 && height == 288)
return 1;
// ERROR
else
return AVERROR(EINVAL);
}
void ff_h261_encode_picture_header(MpegEncContext *s, int picture_number)
{
H261EncContext *const h = (H261EncContext *)s;
int format, temp_ref;
int temp_ref;
align_put_bits(&s->pb);
@ -81,18 +72,13 @@ void ff_h261_encode_picture_header(MpegEncContext *s, int picture_number)
put_bits(&s->pb, 1, 0); /* camera off */
put_bits(&s->pb, 1, s->pict_type == AV_PICTURE_TYPE_I); /* freeze picture release on/off */
format = ff_h261_get_picture_format(s->width, s->height);
put_bits(&s->pb, 1, format); /* 0 == QCIF, 1 == CIF */
put_bits(&s->pb, 1, h->format); /* 0 == QCIF, 1 == CIF */
put_bits(&s->pb, 1, 1); /* still image mode */
put_bits(&s->pb, 1, 1); /* reserved */
put_bits(&s->pb, 1, 0); /* no PEI */
if (format == 0)
h->gob_number = -1;
else
h->gob_number = 0;
h->gob_number = h->format - 1;
s->mb_skip_run = 0;
}
@ -102,7 +88,7 @@ void ff_h261_encode_picture_header(MpegEncContext *s, int picture_number)
static void h261_encode_gob_header(MpegEncContext *s, int mb_line)
{
H261EncContext *const h = (H261EncContext *)s;
if (ff_h261_get_picture_format(s->width, s->height) == 0) {
if (h->format == H261_QCIF) {
h->gob_number += 2; // QCIF
} else {
h->gob_number++; // CIF
@ -118,6 +104,7 @@ static void h261_encode_gob_header(MpegEncContext *s, int mb_line)
void ff_h261_reorder_mb_index(MpegEncContext *s)
{
const H261EncContext *const h = (H261EncContext*)s;
int index = s->mb_x + s->mb_y * s->mb_width;
if (index % 11 == 0) {
@ -129,7 +116,7 @@ void ff_h261_reorder_mb_index(MpegEncContext *s)
/* for CIF the GOB's are fragmented in the middle of a scanline
* that's why we need to adjust the x and y index of the macroblocks */
if (ff_h261_get_picture_format(s->width, s->height) == 1) { // CIF
if (h->format == H261_CIF) {
s->mb_x = index % 11;
index /= 11;
s->mb_y = index % 3;
@ -387,7 +374,11 @@ av_cold int ff_h261_encode_init(MpegEncContext *s)
H261EncContext *const h = (H261EncContext*)s;
static AVOnce init_static_once = AV_ONCE_INIT;
if (ff_h261_get_picture_format(s->width, s->height) < 0) {
if (s->width == 176 && s->height == 144) {
h->format = H261_QCIF;
} else if (s->width == 352 && s->height == 288) {
h->format = H261_CIF;
} else {
av_log(s->avctx, AV_LOG_ERROR,
"The specified picture size of %dx%d is not valid for the "
"H.261 codec.\nValid sizes are 176x144, 352x288\n",

1
libavcodec/h261enc.h
View File

@ -30,7 +30,6 @@
#include "mpegvideo.h"
int ff_h261_get_picture_format(int width, int height);
void ff_h261_reorder_mb_index(MpegEncContext *s);
void ff_h261_encode_mb(MpegEncContext *s, int16_t block[6][64],
int motion_x, int motion_y);