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ffmpeg/libavcodec/libschroedinger.c

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/*
* Copyright (c) 2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com >
*
* 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
* function definitions common to libschroedinger decoder and encoder
*/
#include "libavutil/attributes.h"
#include "libavutil/mem.h"
#include "libschroedinger.h"
static const SchroVideoFormatInfo ff_schro_video_format_info[] = {
{ 640, 480, 24000, 1001},
{ 176, 120, 15000, 1001},
{ 176, 144, 25, 2 },
{ 352, 240, 15000, 1001},
{ 352, 288, 25, 2 },
{ 704, 480, 15000, 1001},
{ 704, 576, 25, 2 },
{ 720, 480, 30000, 1001},
{ 720, 576, 25, 1 },
{ 1280, 720, 60000, 1001},
{ 1280, 720, 50, 1 },
{ 1920, 1080, 30000, 1001},
{ 1920, 1080, 25, 1 },
{ 1920, 1080, 60000, 1001},
{ 1920, 1080, 50, 1 },
{ 2048, 1080, 24, 1 },
{ 4096, 2160, 24, 1 },
};
static unsigned int get_video_format_idx(AVCodecContext *avctx)
{
unsigned int ret_idx = 0;
unsigned int idx;
unsigned int num_formats = sizeof(ff_schro_video_format_info) /
sizeof(ff_schro_video_format_info[0]);
for (idx = 1; idx < num_formats; ++idx) {
const SchroVideoFormatInfo *vf = &ff_schro_video_format_info[idx];
if (avctx->width == vf->width &&
avctx->height == vf->height) {
ret_idx = idx;
if (avctx->time_base.den == vf->frame_rate_num &&
avctx->time_base.num == vf->frame_rate_denom)
return idx;
}
}
return ret_idx;
}
av_cold void ff_schro_queue_init(FFSchroQueue *queue)
{
queue->p_head = queue->p_tail = NULL;
queue->size = 0;
}
void ff_schro_queue_free(FFSchroQueue *queue, void (*free_func)(void *))
{
while (queue->p_head)
free_func(ff_schro_queue_pop(queue));
}
int ff_schro_queue_push_back(FFSchroQueue *queue, void *p_data)
{
FFSchroQueueElement *p_new = av_mallocz(sizeof(FFSchroQueueElement));
if (!p_new)
return -1;
p_new->data = p_data;
if (!queue->p_head)
queue->p_head = p_new;
else
queue->p_tail->next = p_new;
queue->p_tail = p_new;
++queue->size;
return 0;
}
void *ff_schro_queue_pop(FFSchroQueue *queue)
{
FFSchroQueueElement *top = queue->p_head;
if (top) {
void *data = top->data;
queue->p_head = queue->p_head->next;
--queue->size;
av_freep(&top);
return data;
}
return NULL;
}
/**
* Schroedinger video preset table. Ensure that this tables matches up correctly
* with the ff_schro_video_format_info table.
*/
static const SchroVideoFormatEnum ff_schro_video_formats[]={
SCHRO_VIDEO_FORMAT_CUSTOM ,
SCHRO_VIDEO_FORMAT_QSIF ,
SCHRO_VIDEO_FORMAT_QCIF ,
SCHRO_VIDEO_FORMAT_SIF ,
SCHRO_VIDEO_FORMAT_CIF ,
SCHRO_VIDEO_FORMAT_4SIF ,
SCHRO_VIDEO_FORMAT_4CIF ,
SCHRO_VIDEO_FORMAT_SD480I_60 ,
SCHRO_VIDEO_FORMAT_SD576I_50 ,
SCHRO_VIDEO_FORMAT_HD720P_60 ,
SCHRO_VIDEO_FORMAT_HD720P_50 ,
SCHRO_VIDEO_FORMAT_HD1080I_60 ,
SCHRO_VIDEO_FORMAT_HD1080I_50 ,
SCHRO_VIDEO_FORMAT_HD1080P_60 ,
SCHRO_VIDEO_FORMAT_HD1080P_50 ,
SCHRO_VIDEO_FORMAT_DC2K_24 ,
SCHRO_VIDEO_FORMAT_DC4K_24 ,
};
SchroVideoFormatEnum ff_get_schro_video_format_preset(AVCodecContext *avctx)
{
unsigned int num_formats = sizeof(ff_schro_video_formats) /
sizeof(ff_schro_video_formats[0]);
unsigned int idx = get_video_format_idx(avctx);
return (idx < num_formats) ? ff_schro_video_formats[idx] :
SCHRO_VIDEO_FORMAT_CUSTOM;
}
int ff_get_schro_frame_format (SchroChromaFormat schro_pix_fmt,
SchroFrameFormat *schro_frame_fmt)
{
unsigned int num_formats = sizeof(schro_pixel_format_map) /
sizeof(schro_pixel_format_map[0]);
int idx;
for (idx = 0; idx < num_formats; ++idx) {
if (schro_pixel_format_map[idx].schro_pix_fmt == schro_pix_fmt) {
*schro_frame_fmt = schro_pixel_format_map[idx].schro_frame_fmt;
return 0;
}
}
return -1;
}
static void free_schro_frame(SchroFrame *frame, void *priv)
{
AVPicture *p_pic = priv;
if (!p_pic)
return;
avpicture_free(p_pic);
av_freep(&p_pic);
}
SchroFrame *ff_create_schro_frame(AVCodecContext *avctx,
SchroFrameFormat schro_frame_fmt)
{
AVPicture *p_pic;
SchroFrame *p_frame;
int y_width, uv_width;
int y_height, uv_height;
int i;
y_width = avctx->width;
y_height = avctx->height;
uv_width = y_width >> (SCHRO_FRAME_FORMAT_H_SHIFT(schro_frame_fmt));
uv_height = y_height >> (SCHRO_FRAME_FORMAT_V_SHIFT(schro_frame_fmt));
p_pic = av_mallocz(sizeof(AVPicture));
if (!p_pic || avpicture_alloc(p_pic, avctx->pix_fmt, y_width, y_height) < 0) {
av_free(p_pic);
return NULL;
}
p_frame = schro_frame_new();
p_frame->format = schro_frame_fmt;
p_frame->width = y_width;
p_frame->height = y_height;
schro_frame_set_free_callback(p_frame, free_schro_frame, (void *)p_pic);
for (i = 0; i < 3; ++i) {
p_frame->components[i].width = i ? uv_width : y_width;
p_frame->components[i].stride = p_pic->linesize[i];
p_frame->components[i].height = i ? uv_height : y_height;
p_frame->components[i].length =
p_frame->components[i].stride * p_frame->components[i].height;
p_frame->components[i].data = p_pic->data[i];
if (i) {
p_frame->components[i].v_shift =
SCHRO_FRAME_FORMAT_V_SHIFT(p_frame->format);
p_frame->components[i].h_shift =
SCHRO_FRAME_FORMAT_H_SHIFT(p_frame->format);
}
}
return p_frame;
}
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