yading@10: /*
yading@10:  * Copyright (c) 2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com >
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10: * @file
yading@10: * function definitions common to libschroedinger decoder and encoder
yading@10: */
yading@10: 
yading@10: #include "libschroedinger.h"
yading@10: #include "libavutil/mem.h"
yading@10: 
yading@10: static const SchroVideoFormatInfo ff_schro_video_format_info[] = {
yading@10:     { 640,  480,  24000, 1001},
yading@10:     { 176,  120,  15000, 1001},
yading@10:     { 176,  144,  25,    2   },
yading@10:     { 352,  240,  15000, 1001},
yading@10:     { 352,  288,  25,    2   },
yading@10:     { 704,  480,  15000, 1001},
yading@10:     { 704,  576,  25,    2   },
yading@10:     { 720,  480,  30000, 1001},
yading@10:     { 720,  576,  25,    1   },
yading@10:     { 1280, 720,  60000, 1001},
yading@10:     { 1280, 720,  50,    1   },
yading@10:     { 1920, 1080, 30000, 1001},
yading@10:     { 1920, 1080, 25,    1   },
yading@10:     { 1920, 1080, 60000, 1001},
yading@10:     { 1920, 1080, 50,    1   },
yading@10:     { 2048, 1080, 24,    1   },
yading@10:     { 4096, 2160, 24,    1   },
yading@10: };
yading@10: 
yading@10: static unsigned int get_video_format_idx(AVCodecContext *avctx)
yading@10: {
yading@10:     unsigned int ret_idx = 0;
yading@10:     unsigned int idx;
yading@10:     unsigned int num_formats = sizeof(ff_schro_video_format_info) /
yading@10:                                sizeof(ff_schro_video_format_info[0]);
yading@10: 
yading@10:     for (idx = 1; idx < num_formats; ++idx) {
yading@10:         const SchroVideoFormatInfo *vf = &ff_schro_video_format_info[idx];
yading@10:         if (avctx->width  == vf->width &&
yading@10:             avctx->height == vf->height) {
yading@10:             ret_idx = idx;
yading@10:             if (avctx->time_base.den == vf->frame_rate_num &&
yading@10:                 avctx->time_base.num == vf->frame_rate_denom)
yading@10:                 return idx;
yading@10:         }
yading@10:     }
yading@10:     return ret_idx;
yading@10: }
yading@10: 
yading@10: void ff_schro_queue_init(FFSchroQueue *queue)
yading@10: {
yading@10:     queue->p_head = queue->p_tail = NULL;
yading@10:     queue->size = 0;
yading@10: }
yading@10: 
yading@10: void ff_schro_queue_free(FFSchroQueue *queue, void (*free_func)(void *))
yading@10: {
yading@10:     while (queue->p_head)
yading@10:         free_func(ff_schro_queue_pop(queue));
yading@10: }
yading@10: 
yading@10: int ff_schro_queue_push_back(FFSchroQueue *queue, void *p_data)
yading@10: {
yading@10:     FFSchroQueueElement *p_new = av_mallocz(sizeof(FFSchroQueueElement));
yading@10: 
yading@10:     if (!p_new)
yading@10:         return -1;
yading@10: 
yading@10:     p_new->data = p_data;
yading@10: 
yading@10:     if (!queue->p_head)
yading@10:         queue->p_head = p_new;
yading@10:     else
yading@10:         queue->p_tail->next = p_new;
yading@10:     queue->p_tail = p_new;
yading@10: 
yading@10:     ++queue->size;
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: void *ff_schro_queue_pop(FFSchroQueue *queue)
yading@10: {
yading@10:     FFSchroQueueElement *top = queue->p_head;
yading@10: 
yading@10:     if (top) {
yading@10:         void *data = top->data;
yading@10:         queue->p_head = queue->p_head->next;
yading@10:         --queue->size;
yading@10:         av_freep(&top);
yading@10:         return data;
yading@10:     }
yading@10: 
yading@10:     return NULL;
yading@10: }
yading@10: 
yading@10: /**
yading@10: * Schroedinger video preset table. Ensure that this tables matches up correctly
yading@10: * with the ff_schro_video_format_info table.
yading@10: */
yading@10: static const SchroVideoFormatEnum ff_schro_video_formats[]={
yading@10:     SCHRO_VIDEO_FORMAT_CUSTOM     ,
yading@10:     SCHRO_VIDEO_FORMAT_QSIF       ,
yading@10:     SCHRO_VIDEO_FORMAT_QCIF       ,
yading@10:     SCHRO_VIDEO_FORMAT_SIF        ,
yading@10:     SCHRO_VIDEO_FORMAT_CIF        ,
yading@10:     SCHRO_VIDEO_FORMAT_4SIF       ,
yading@10:     SCHRO_VIDEO_FORMAT_4CIF       ,
yading@10:     SCHRO_VIDEO_FORMAT_SD480I_60  ,
yading@10:     SCHRO_VIDEO_FORMAT_SD576I_50  ,
yading@10:     SCHRO_VIDEO_FORMAT_HD720P_60  ,
yading@10:     SCHRO_VIDEO_FORMAT_HD720P_50  ,
yading@10:     SCHRO_VIDEO_FORMAT_HD1080I_60 ,
yading@10:     SCHRO_VIDEO_FORMAT_HD1080I_50 ,
yading@10:     SCHRO_VIDEO_FORMAT_HD1080P_60 ,
yading@10:     SCHRO_VIDEO_FORMAT_HD1080P_50 ,
yading@10:     SCHRO_VIDEO_FORMAT_DC2K_24    ,
yading@10:     SCHRO_VIDEO_FORMAT_DC4K_24    ,
yading@10: };
yading@10: 
yading@10: SchroVideoFormatEnum ff_get_schro_video_format_preset(AVCodecContext *avctx)
yading@10: {
yading@10:     unsigned int num_formats = sizeof(ff_schro_video_formats) /
yading@10:                                sizeof(ff_schro_video_formats[0]);
yading@10: 
yading@10:     unsigned int idx = get_video_format_idx(avctx);
yading@10: 
yading@10:     return (idx < num_formats) ? ff_schro_video_formats[idx] :
yading@10:                                  SCHRO_VIDEO_FORMAT_CUSTOM;
yading@10: }
yading@10: 
yading@10: int ff_get_schro_frame_format (SchroChromaFormat schro_pix_fmt,
yading@10:                                SchroFrameFormat  *schro_frame_fmt)
yading@10: {
yading@10:     unsigned int num_formats = sizeof(schro_pixel_format_map) /
yading@10:                                sizeof(schro_pixel_format_map[0]);
yading@10: 
yading@10:     int idx;
yading@10: 
yading@10:     for (idx = 0; idx < num_formats; ++idx) {
yading@10:         if (schro_pixel_format_map[idx].schro_pix_fmt == schro_pix_fmt) {
yading@10:             *schro_frame_fmt = schro_pixel_format_map[idx].schro_frame_fmt;
yading@10:             return 0;
yading@10:         }
yading@10:     }
yading@10:     return -1;
yading@10: }
yading@10: 
yading@10: static void free_schro_frame(SchroFrame *frame, void *priv)
yading@10: {
yading@10:     AVPicture *p_pic = priv;
yading@10: 
yading@10:     if (!p_pic)
yading@10:         return;
yading@10: 
yading@10:     avpicture_free(p_pic);
yading@10:     av_freep(&p_pic);
yading@10: }
yading@10: 
yading@10: SchroFrame *ff_create_schro_frame(AVCodecContext *avctx,
yading@10:                                   SchroFrameFormat schro_frame_fmt)
yading@10: {
yading@10:     AVPicture *p_pic;
yading@10:     SchroFrame *p_frame;
yading@10:     int y_width, uv_width;
yading@10:     int y_height, uv_height;
yading@10:     int i;
yading@10: 
yading@10:     y_width   = avctx->width;
yading@10:     y_height  = avctx->height;
yading@10:     uv_width  = y_width  >> (SCHRO_FRAME_FORMAT_H_SHIFT(schro_frame_fmt));
yading@10:     uv_height = y_height >> (SCHRO_FRAME_FORMAT_V_SHIFT(schro_frame_fmt));
yading@10: 
yading@10:     p_pic = av_mallocz(sizeof(AVPicture));
yading@10:     if (!p_pic || avpicture_alloc(p_pic, avctx->pix_fmt, y_width, y_height) < 0) {
yading@10:         av_free(p_pic);
yading@10:         return NULL;
yading@10:     }
yading@10: 
yading@10:     p_frame         = schro_frame_new();
yading@10:     p_frame->format = schro_frame_fmt;
yading@10:     p_frame->width  = y_width;
yading@10:     p_frame->height = y_height;
yading@10:     schro_frame_set_free_callback(p_frame, free_schro_frame, (void *)p_pic);
yading@10: 
yading@10:     for (i = 0; i < 3; ++i) {
yading@10:         p_frame->components[i].width  = i ? uv_width : y_width;
yading@10:         p_frame->components[i].stride = p_pic->linesize[i];
yading@10:         p_frame->components[i].height = i ? uv_height : y_height;
yading@10:         p_frame->components[i].length =
yading@10:                  p_frame->components[i].stride * p_frame->components[i].height;
yading@10:         p_frame->components[i].data   = p_pic->data[i];
yading@10: 
yading@10:         if (i) {
yading@10:             p_frame->components[i].v_shift =
yading@10:                 SCHRO_FRAME_FORMAT_V_SHIFT(p_frame->format);
yading@10:             p_frame->components[i].h_shift =
yading@10:                 SCHRO_FRAME_FORMAT_H_SHIFT(p_frame->format);
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     return p_frame;
yading@10: }